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Solve This Problem & Be Hired as Consultant by Neyozak: 2:35pm On Oct 06, 2015
2raised to power 2x = 8x

1 Like

Re: Solve This Problem & Be Hired as Consultant by Neyozak: 2:43pm On Oct 06, 2015
pls step by steps solution
Re: Solve This Problem & Be Hired as Consultant by Nobody: 3:09pm On Oct 06, 2015
are you saying (2^2x) =8x
Re: Solve This Problem & Be Hired as Consultant by chipretty48(f): 3:22pm On Oct 06, 2015
2^2x=8 2^2x=2x2x2 2^2x=2^3 when u cancel both 2 in the bracket, you have: 2x=3 divide both sides by 2 2x/2=3/2 x=3/2

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Re: Solve This Problem & Be Hired as Consultant by Bhayomi(m): 3:37pm On Oct 06, 2015
chipretty48:
2^2x=8 2^2x=2x2x2 2^2x=2^3 when u cancel both 2 in the bracket, you have: 2x=3 divide both sides by 2 2x/2=3/2 x=3/2
You miss it, sorry
Re: Solve This Problem & Be Hired as Consultant by Nobody: 3:37pm On Oct 06, 2015
chipretty48:
2^2x=8 2^2x=2x2x2 2^2x=2^3 when u cancel both 2 in the bracket, you have: 2x=3 divide both sides by 2 2x/2=3/2 x=3/2
it is 8x not 8

2 Likes

Re: Solve This Problem & Be Hired as Consultant by crotonite(m): 3:45pm On Oct 06, 2015
.











.

//ans.ComingSoon = true;
//wait++;


**modified***

since 2^2x = 8x

let x = 2.

2^(2*2) = 8*2.

2 ^ 4 = 16. ;which is true.
simple as abc.

3 Likes

Re: Solve This Problem & Be Hired as Consultant by clementnoble22(m): 3:50pm On Oct 06, 2015
Neyozak:
2raised to power 2x = 8x
Guy recheck ur question... I think this question is wrong.
2^2x=8x ---> Wrong
2^2x=8---> Right
Solution
2^2x=2^3
2x=3
x= 3/2

3 Likes

Re: Solve This Problem & Be Hired as Consultant by Bhayomi(m): 3:53pm On Oct 06, 2015
crotonite:
.










.
//ans.ComingSoon = true; //wait++;

**modified***
since 2^2x = 8x
let x = 2.
2^(2*2) = 8*2.
2 ^ 4 = 16. ;which is true. simple as abc.
No, that's not how to do it.

1 Like

Re: Solve This Problem & Be Hired as Consultant by segedy: 3:56pm On Oct 06, 2015
2x = 8x
(2^3)x = 8x
Thus,
(2*2*2)x = 8x solved

Read the question again...I may be wrong!
But you gave a wrong question if what I'm thinking now is correct...it should become a polynomial.. but there's no way that's gonna run!

Or it could be
2^2x = 8x;
2^2x = (2^3)x:
(2^2x)/(2^3) = x;
2^(2x - 3) = x;

...can't go futher o, idea is needed

1 Like

Re: Solve This Problem & Be Hired as Consultant by crotonite(m): 3:59pm On Oct 06, 2015
segedy:
2x = 8x
(2^3)x = 8x
Thus,
(2*2*2)x = 8x solved
Re: Solve This Problem & Be Hired as Consultant by NOBODYY: 4:00pm On Oct 06, 2015
.
Re: Solve This Problem & Be Hired as Consultant by zenith4biz(m): 4:11pm On Oct 06, 2015
2^2x=8x 2*2*2x=8x 8x=8x
Re: Solve This Problem & Be Hired as Consultant by flossy007: 4:11pm On Oct 06, 2015
2^ 2x = 8x

Log100 ^2x = 8x ( log to base 10)

100^2x = 10^8x

(10^2) ^ 2x = 10^8x

(2x)^2 = 8x

4x^2 = 8x

X^2 = 2x

X = 2

Hope I got it smiley

2 Likes

Re: Solve This Problem & Be Hired as Consultant by ayindepremier: 4:14pm On Oct 06, 2015
see d 2, see d x and see d 8 now. they are mathematical expressions and my statement is "lazical" expression.




zooming...
Re: Solve This Problem & Be Hired as Consultant by engrrichie92(m): 4:16pm On Oct 06, 2015
2^2x = 8x

Introducing log to both sides

log2^2x = log8x

log2^2x = log 8 + logx

2xlog2 = log 8 + logx

Na so i hang o...im coming back with the solution, gimme ten mins

2 Likes

Re: Solve This Problem & Be Hired as Consultant by Neyozak: 4:17pm On Oct 06, 2015
Neyozak:
2raised to power 2x = 8x


Gurus in the house, the question is correct. Sure d solution is 2. But convincing steps to the solution is what is required. Mathematician goodluck.
Re: Solve This Problem & Be Hired as Consultant by afeezet(m): 4:20pm On Oct 06, 2015
kiss
Re: Solve This Problem & Be Hired as Consultant by flossy007: 4:21pm On Oct 06, 2015
Check the solution I posted some mins ago.
Neyozak:



Gurus in the house, the question is correct. Sure d solution is 2. But convincing steps to the solution is what is required. Mathematician goodluck.
Re: Solve This Problem & Be Hired as Consultant by afeezet(m): 4:21pm On Oct 06, 2015
U need the workings try to confirm the first one
Re: Solve This Problem & Be Hired as Consultant by Neyozak: 4:21pm On Oct 06, 2015
flossy007:
2^ 2x = 8x
Log100 ^2x = 8x ( log to base 10)
100^2x = 10^8x
(10^2) ^ 2x = 10^8x
(2x)^2 = 8x
4x^2 = 8x
X^2 = 2x
X = 2

Hope I got it smiley
U tried but Ur was not too convincing!

2 Likes

Re: Solve This Problem & Be Hired as Consultant by Nobody: 4:22pm On Oct 06, 2015
nah
Re: Solve This Problem & Be Hired as Consultant by dejt4u(m): 4:22pm On Oct 06, 2015
Neyozak:
2raised to power 2x = 8x
2^2x=8x,

2^2x=2^3(x),

(2^2x) / (2^3) = x,

2^(2x-3)=x,

2^(2x-3)/4^(2x-3)=x/4^(2x-3),

(1/2)^(2x-3)=x*(1/4)^(2x-3),

(0.5)^(2x-3)=x*(0.25)^(2x-3),

(1-0.5)^(2x-3)=x*(1-0.75)^(2x-3),

by binomial approx.

1-(2x-3)*0.5...=

x*[1-(2x-3)*0.75+...]

re-arrangin gives;

1-x+3/2=x-3x/4*(2x-3) = 4-4x+6=4x-6x^2+9x

or

6x^2-17x+6=0,

x=2.4 or - 0.42

Reference to laplacian of nairaland maths clinic
Re: Solve This Problem & Be Hired as Consultant by Alvanify(m): 4:27pm On Oct 06, 2015
2x^2=8x
soln
divide thru by x
2x^2/x=8x/x
therefore, 2x=8
x=4ans

1 Like

Re: Solve This Problem & Be Hired as Consultant by flossy007: 4:27pm On Oct 06, 2015
Haha. Not convincing? I'm pretty sure that's the solution to that question. But i'll let others have a go at it.

Neyozak:

U tried but Ur was not too convincing!
Re: Solve This Problem & Be Hired as Consultant by Softhands(m): 4:33pm On Oct 06, 2015
2^2x =8x.. take the equation and make it equal to zero 2^2x-8x=0 introduce differentiation, dy/da ( 2^2x-8x) 4x^(2x-1) - 8 =0 4x^(2x-1)=8 2 X 2^ (2x-1) = 2^3 2x-1=3 2x=3 +1; 2x=4, x=4/2= 2
final ans , x=2
Danke.
Re: Solve This Problem & Be Hired as Consultant by Softhands(m): 4:38pm On Oct 06, 2015
2^2x =8x.. take the equation and make it equal to zero 2^2x-8x=0 introduce differentiation, . dy/da ( 2^2x-8x) . 4x^(2x-1) - 8 =0 . 4x^(2x-1)=8 . 2 X 2^ (2x-1) = 2^3 . 2x-1=3 . 2x=3 +1; 2x=4, . x=4/2= 2 .
final ans , x=2
Danke.
Re: Solve This Problem & Be Hired as Consultant by INCREDIBLEGUY: 4:40pm On Oct 06, 2015
2^ 2x = 8x
Log100 ^2x = 8x ( 1*1=11+2+2 =22+1000000+10000000000 =2223556777777777777
Re: Solve This Problem & Be Hired as Consultant by Neyozak: 4:48pm On Oct 06, 2015
dejt4u:
2^2x=8x,
2^2x=2^3(x),
(2^2x) / (2^3) = x,
2^(2x-3)=x,
2^(2x-3)/4^(2x-3)=x/4^(2x-3),
(1/2)^(2x-3)=x*(1/4)^(2x-3),
(0.5)^(2x-3)=x*(0.25)^(2x-3),
(1-0.5)^(2x-3)=x*(1-0.75)^(2x-3),
by binomial approx.
1-(2x-3)*0.5...=
x*[1-(2x-3)*0.75+...]
re-arrangin gives;
1-x+3/2=x-3x/4*(2x-3) = 4-4x+6=4x-6x^2+9x
or
6x^2-17x+6=0,
x=2.4 or - 0.42
Reference to laplacian of nairaland maths clinic
Tried but no.
Re: Solve This Problem & Be Hired as Consultant by Neyozak: 4:50pm On Oct 06, 2015
Softhands:
2^2x =8x.. take the equation and make it equal to zero 2^2x-8x=0 introduce differentiation, . dy/da ( 2^2x-8x) . 4x^(2x-1) - 8 =0 . 4x^(2x-1)=8 . 2 X 2^ (2x-1) = 2^3 . 2x-1=3 . 2x=3 +1; 2x=4, . x=4/2= 2 .
final ans , x=2
Danke.
Tried but what function is y and a. No my tutor
Re: Solve This Problem & Be Hired as Consultant by Softhands(m): 4:56pm On Oct 06, 2015
Neyozak:

Tried but what function is y and a. No my tutor
Twas a typo o jareh. but that's d best approach so far. at least professionally.
Re: Solve This Problem & Be Hired as Consultant by Neyozak: 4:57pm On Oct 06, 2015
flossy007:
2^ 2x = 8x

Log100 ^2x = 8x ( log to base 10) step correct

100^2x = 10^8x step correct

(10^2) ^ 2x = 10^8x step correct

(2x)^2 = 8x step not correct ( here u are to equate powers to have 4x equals 8x)


4x^2 = 8x

X^2 = 2x

X = 2

Hope I got it smiley
But u tried sha! But not convincing. Idea my guy. 50% 4 u.

1 Like

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