₦airaland Forum

Talkwisdom:
Your phone number or email address.. Let me contact you immediately.
It is first order and second order differential equations for 200level

benbuks10@gmail.com

seuntosyn:
help slove this: find the values of x for which
√x -2√x+5=8 note the square root covers x+5
√x +2√x+7 =11 the squr root covers x+7

1. X=4
2. X=9

gurus in the house help me solve this
PQRS is a trapezium in which PQ=16cm,QR=12cm,RS =8cm and PQR =30°.calculate the area of PQRS

pls gurus help me to solve number 8 and 9

@ Pasca07
1. 72
2. 17
3. 27; all in nearest cm²

GreatYinkus:
@ Pasca07 1. 72 2. 17 3. 27; all in nearest cm²

God bless u thanks

1. If m= ⁿC₂, prove that ^mC₂ = ³ⁿ⁺¹C₄

2. If ²⁸C_2r = ²⁴C_2r-4 = 125:11, find r.

@ agentofchange1 et al; I really need your help ASAP, thanks in anticipation.

Pasca07:
God bless u thanks

Amen and you too bro...

Greetings to everyone in the house...
Its been a while I participated on this group... But am using this medium to tell you that am fully back to make contributions, to learn from my oga's...
Thanks.
#P.series

GreatYinkus:
1. If m= ⁿC₂, prove that ^mC₂ = ³ⁿ⁺¹C₄

2. If ²⁸C_2r = ²⁴C_2r-4 = 125:11, find r.

At bolded is it equality sign dat ought to be there or a colon?
i.e is it = or :

GreatYinkus:
1. If m= ⁿC₂, prove that ^mC₂ = ³ⁿ⁺¹C₄

2. If ²⁸C_2r = ²⁴C_2r-4 = 125:11, find r.

@ agentofchange1 et al; I really need your help ASAP, thanks in anticipation.

Q1 ought to be like this ...

ladokuntlad:
At bolded is it equality sign dat ought to be there or a colon?
i.e is it = or :

Oh it should be : and not =; also it should be 225:11 and not 125:11, I've gotten it already. Thanks very much. Textbook error

agentofchange1:
Q1 ought to be like this ...

You are very right, no wonder I substituted an arbitrary value, they weren't equal. Thanks Oga benbuks I really appreciate your works.

rhydex247:
Greetings to everyone in the house...
Its been a while I participated on this group... But am using this medium to tell you that am fully back to make contributions, to learn from my oga's...
Thanks.
#P.series

You are welcome back boss.

GreatYinkus:
Oh it should be : and not =; also it should be 225:11 and not 125:11, I've gotten it already. Thanks very much. Textbook error

Good u ve got it now. But just for d records, u suppose drops working here na.thats d essence of d thread.

Good day. Can someone help to differeciate y=4x^5 from the first principle?

Edozie82:
Good day. Can someone help to differeciate y=4x^5 from the first principle?

Here you go.

Can someone help with how the twos complements was gotten

invinzible1:
Can someone help with how the twos complements was gotten

Add 1 to d first number from right.

Dats it

invinzible1:
Can someone help with how the twos complements was gotten

you should take note that the digits are in binary or base 2, so when you add 1+1,which is 2,what you will do is to treat 2 as a digit in base 10 and convert it base 2 by using repeated division; 2/2= 1 remainder 0;
then, 1/2 = 0 remainder 1
the "2" now becomes 10. You write the digit 0,carry digit 1 to the next column to your left, then continue your addition in that order.

Mathemagician1:
Here you go.

thanks I appreciate

invinzible1:
Can someone help with how the twos complements was gotten

There exist a simple method in analyzing 1's and 2's complements problems. Let me try and see if I could break it down for you.

For example, you are told to represent (-6) in both 1's and 2's complement assuming a 4bits representation?

Steps to solving the problem:
Step 1: Raise the given bit by power 2, i.e., 2^4 = 16

Step 2: Add the given negative number (-6) to the number gotten from step 1, that is, 16 + (-6) = 16 - 6 = 10

Step 3: look for the binary representation of the denary number (10) in this case, that is,
2|10
2| 5 + 0
2| 2 + 1
2| 1 + 0
2| 0 + 1

:. 10 = 1010 two

So, 1010 is your 2's complement 4bits representation of -6.

And to get the 1's complement representation of -6; simply subtract 1 from the 2's complement representation, that is,

1010
- 1
_____
1001
_____

Therefore, 1001 is the 1's complement 4bits representation of -6.

Hope this helps!

Festy4u:
There exist a simple method in analyzing 1's and 2's complements problems. Let me try and see if I could break it down for you.

For example, you are told to represent (-6) in both 1's and 2's complement assuming a 4bits representation?

Steps to solving the problem:
Step 1: Raise the given bit by power 2, i.e., 2^4 = 16

Step 2: Add the given negative number (-6) to the number gotten from step 1, that is, 16 + (-6) = 16 - 6 = 10

Step 3: look for the binary representation of the denary number (10) in this case, that is,
2|10
2| 5 + 0
2| 2 + 1
2| 1 + 0
2| 0 + 1

:. 10 = 1010 two

So, 1010 is your 2's complement 4bits representation of -6.

And to get the 1's complement representation of -6; simply subtract 1 from the 2's complement representation, that is,

1010
- 1
_____
1001
_____

Therefore, 1001 is the 1's complement 4bits representation of -6.

Hope this helps!

Thank you but in a scenario where you are given 1010 to get the twos how will one go about it.

ladokuntlad:
Add 1 to d first number from right.
Dats it

I don't get. Can u pls explain more

Why all this kindergarten maths

invinzible1:
Thank you but in a scenario where you are given 1010 to get the twos how will one go about it.

First u find d one complement
I.e u change all zeros to one and vice versa
Now ee av
0101 as d one complement


Now to get twos complement

Add binary 1 to d digit i.e

0101
+ 1
Note: d 1 is added to d first Number to d right just like normal addition. And we carry over remainders wit respect to binary i.e 2

Thus we av

Twos complement to b
0110

How?

If we add 1 to d first number we get 2 and since we dealing wit binary,
2 is divisible by 2 once with remainder zere
Thus d reason for d first zero
Carrying d 1 to d next digit we av 0+1 wich gives 1 and dats d reason for d 1 and
Lastly since dia is no carryover values again simply add d rest.

Dsts all

I Love This

@ agentofchange1 , ladokuntlad et al; pls I need the solution to the problem below:
x⁵ - 3x + 1 = 0.

Hello house! Been a while.

Please, i need a help on this!

On No 1. What kind of equation is this? Who can help me out or maybe a guidelines

No 2. How do i approach this type of maths? Is it the normal BODMAS method approach?

1stknight:
Bro pls I don 't understand how you got the fifth equation.

the equation 5 na manipulation it nt possible