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Can You Solve This Math Question? - Education (8) - Nairaland

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Re: Can You Solve This Math Question? by Deicide: 11:27pm On Apr 15, 2020
For the second one I got stuck here

Y = ln(x) + ln(y)
Re: Can You Solve This Math Question? by Scott200(m): 11:31pm On Apr 15, 2020
Mrshape:
Can Anyone In This Forum kill This?
my answer is n = ([-(d+2a) + or - ((d+2a)^2 - 4d(2a-2s))^1/2]/2d) + 1
Re: Can You Solve This Math Question? by Mrshape: 11:33pm On Apr 15, 2020
Deicide:
For the second one I got stuck here

Y = ln(x) + ln(y)
Oh!
I doubt if anyone can solve thus in this forum not more than 2 people.

It takes the special grace to have seen the process required to solve it
Re: Can You Solve This Math Question? by inyenejo(m): 11:34pm On Apr 15, 2020
2^c(5), y(54)_6{2b}[~2] <[9]=9d
Simple.
Re: Can You Solve This Math Question? by Scott200(m): 11:34pm On Apr 15, 2020
Mrshape:

Oh!
I doubt if anyone can solve thus in this forum not more than 2 people.

It takes the special grace to have seen the process required to solve it
check my solution above
Re: Can You Solve This Math Question? by mrbenjame: 11:36pm On Apr 15, 2020
josh123:
Who mathematics help.

Ask the Chinese!

1 Like

Re: Can You Solve This Math Question? by Ugaboy: 11:37pm On Apr 15, 2020
Amotolongbo:
n2 = [2S + d-2a]/d
Or

n = [(2S + d-2a)/d] ^0.5

bravo...let me break ur heart

u actually want to use another approach but u miss some...I can see ur mistake

and this correct

n =+- [(2S + d-2a)/d] ^0.5

because n is a real number from must obey the both the - & + number line(abstract algebra or real analysis)
same as the almighty formula solution not to fail
Re: Can You Solve This Math Question? by Mrshape: 11:38pm On Apr 15, 2020
Scott200:
my answer is n = ([-(d+2a) + or - ((d+2a)^2 - 4d(2a-2s))^1/2]/2d) + 1
What is the last +1 for?
Re: Can You Solve This Math Question? by Deicide: 11:42pm On Apr 15, 2020
Mrshape:

Oh!
I doubt if anyone can solve thus in this forum not more than 2 people.

It takes the special grace to have seen the process required to solve it
I would try sha just need to get some facts
Re: Can You Solve This Math Question? by Mrshape: 11:43pm On Apr 15, 2020
Deicide:
I would try sha just need to get some facts
Alright.
I will be glad to see your solution.
The solution is not up to 12 steps
Re: Can You Solve This Math Question? by Scott200(m): 11:43pm On Apr 15, 2020
Mrshape:

What is the last +1 for?
I changed n- 1 to be C did some manipulation arranged in format of quadractic equation, used almighty formula then changed C back to n - 1, so to get n u have to add 1 to the other side of the equation
Re: Can You Solve This Math Question? by LamaNewton(m): 11:44pm On Apr 15, 2020
Either
n = [(d - 2a) + (4a^2 - 4ad + d^2 + 8ds)^(1/2) ] /2d
or
n= [(d - 2a) - (4a^2 -4ad + d^2 +8ds)^(1/2)] /2d
...chai
Re: Can You Solve This Math Question? by Scott200(m): 11:45pm On Apr 15, 2020
LamaNewton:
Either
n = [(d - 2a) + (4a^2 - 4ad + d^2 + 8ds)^(1/2) ] /2d
or
n= [(d - 2a) - (4a^2 -4ad + d^2 +8ds)^(1/2)] /2d
chai
nice attempt but I think it is faulty
Re: Can You Solve This Math Question? by Scott200(m): 11:48pm On Apr 15, 2020
Mrshape:
Can Anyone In This Forum kill This?
I also feel a closing bracket is missing. Op check the question
Re: Can You Solve This Math Question? by Amotekun777: 12:04am On Apr 16, 2020
You no go see all dem foolish olosho on dis kain thread
Re: Can You Solve This Math Question? by Topiipii(m): 12:05am On Apr 16, 2020
Mrshape:
This is the correct question.
Lalasticaala this has already been solved you would have put the other one on FP
Everyone is afraid of it

https://www.nairaland.com/5794496/make-y-subject-formula

Check the other thread.
Re: Can You Solve This Math Question? by eminemkayc: 12:07am On Apr 16, 2020
yek:
What can one do with this in real life?
Quite a lot.
1. In reinforced concrete design of structures, the derived equations from the rectangular-parabolic compressive stress block (assumed rectangular in the british code of practice, BS8110) used in determining the lever arm (distance from compression block to tensile force) is derived from equations such as this.
We deplore this equation in the design of reinforced concrete structures subjected to flexural stresses such as low/high rise buildings, retaining walls, foundations, etc

2. In structural dynamics or vibrational mechanics, for free damped, free undamped, forced damped or forced undamped systems the derived equations to understudy the response of a structure or structural system under the action of pulsating loads (forced vibration) requires the solution of a second order differential non-homogenous equation resulting to algebraic equations such as the one put up here

3. In the structural design of sheet piles walls under the action of lateral surcharge, lateral soil stresses, soil pore pressures, etc the determination of the minimum penetration depth of sheet piles or cofferdam from equilibrium equations for stability, narrows down to the resolution of polynomials such as this, and making the penetration depth 'd' the subject of the formula


There are several other citations I can't mention at this time. So these are very applicable. It is also used in the shell design of weapon systems such as the Russian Khinzal weapon by solving the bi-harmonic equations for thin plates and shells
The world generally evolves around applied mathematics.

2 Likes

Re: Can You Solve This Math Question? by AnyaIgbo: 12:08am On Apr 16, 2020
..
Re: Can You Solve This Math Question? by Mrlouis: 12:11am On Apr 16, 2020
eminemkayc:

[s]Quite a lot.
1. In reinforced concrete design of structures, the derived equations from the rectangular-parabolic compressive stress block (assumed rectangular in the british code of practice, BS8110) used in determining the lever arm (distance from compression block to tensile force) is derived from equations such as this.
We deplore this equation in the design of reinforced concrete structures subjected to flexurural stresses such as low/high rise buildings, retaining walls, foundations, etc[/s]

[s]2. In structural dynamics or vibrational mechanics, for free damped, free undamped, forced damped or forced undamped systems the derived equations to understudy the response of a structure or structural system under the action of pulsating loads (forced vibration) requires the solution of a second order differential non-homogenous equation resulting to algebraic equations such as the one put up here[/s]

[s]There are several other citations I can't mention at this time. So these are very applicable. It is also used in the shell design of weapon systems such as the Russian Khinzal weapon by solving the bi-harmonic equations for thin plates and shells
The world generally evolves around applied mathematics.[/s]

Solve the problem of Hunger plaguing Nigerians now!
Re: Can You Solve This Math Question? by Deicide: 12:31am On Apr 16, 2020
Mrshape:

Alright.
I will be glad to see your solution.
The solution is not up to 12 steps
Lol what's the answer?
Re: Can You Solve This Math Question? by solofresh(m): 12:37am On Apr 16, 2020
S=n/2(2a+(n-1)d)
Clear the fraction by multiplying both sides by 2
2S=n(2a+(n-1)d)
swap the d and the (n-1)
2s=n(2a+d(n-1)
remove the inner parentheses on the right:
2s=n(2a+dn-d)
remove the remaining parentheses on the right
2s=2an+dn^2-dn
get O on the left by subtracting 2s from both sides
O=2an+dn^2-dn-2s
swap sides
2an+dn^2-dn-2s=O
dn^2+2an-dn-2s=O
dn^2+n(2a-d)-2s=O
dn^2+(2a-d)n-2s=O
Using quadratic formula
n=-(2a-d)+-(2a-d)^2-4(d)(-2s)/2d
finally
n=-2a+d+-4a^2-4ad+d^2+8ds/2d
Re: Can You Solve This Math Question? by kazyhm(m): 1:04am On Apr 16, 2020
Mrshape:
Can Anyone In This Forum kill This?

This is arithmetic progression
Re: Can You Solve This Math Question? by kazyhm(m): 1:09am On Apr 16, 2020
yek:
What can one do with this in real life?

Interpolation
Extrapolation
Error modeling and analysis
Error correction in observed spatial data
Re: Can You Solve This Math Question? by Bobotic(m): 1:31am On Apr 16, 2020
I hate Mathematics right from day one grin grin grin

Re: Can You Solve This Math Question? by Galapagous(m): 1:50am On Apr 16, 2020
mila1121:
QED
Where is n in the second line
Re: Can You Solve This Math Question? by Galapagous(m): 1:59am On Apr 16, 2020
n=[- 4a+2d+or-(16a^2-4d^2+8ds) ^1/2]/4d
Slept off on it
Re: Can You Solve This Math Question? by horllyma(m): 2:01am On Apr 16, 2020
Check it out.
Re: Can You Solve This Math Question? by opedaydydx9(m): 3:31am On Apr 16, 2020
OlawaleBammie:

Guy wetin b dis
check am well,...... That's your answer
Re: Can You Solve This Math Question? by Mystic969: 4:14am On Apr 16, 2020
Na solvient union na
Re: Can You Solve This Math Question? by Mrshape: 6:39am On Apr 16, 2020
AnyaIgbo:
Hi everyone, I'm back again to this forum. Sorry, I'm just seeing this now.
Lalasticlala, any prize for it?
Let's start by simplifying
s = [n(2a+(n-1)d]/2
Expand the bracket => s = (2an+dn²—d)/2
Noticed, we have exponent of "n", hence we use Calculus/Differentiation. We use the "Quotient Rule" => ds/dn = [vdu/dn - udv/dn]/V² .
where ds/dn means differentiate "s" under "n".
"u" is the numerator, while "v" is the denominator.
ds/dn = [vdu/dn - udv/dn]/v², solving

ds/dn = [2(2a+2dn-d) - (2an+dn²—d)0]/2²
=> ds/dn = 2(2a+2dn—d)/4
simplifying, we have: s = 2a+2dn—d/2
Then, making "n" subject: 2s = 2a+2dn—d
=> 2dn = 2s—2a+d
Therefore,
n = (2s—2a+d)/2d.

cc: Look at the right answer and how I solved it. Prove me wrong, mrshape dejt4u matex97 pyrex23 stennyb, co...

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Let the AP be 1,2
S=3
a=1
d=2
From your formula n=(6-2+2)/4=6/4=1.5
So your formula is wrong My dear

1 Like

Re: Can You Solve This Math Question? by AdeolaOmoOba(m): 6:44am On Apr 16, 2020
Can you do this

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