Math, asked by mishra15mayank, 1 year ago

4 ki power x minus 4 ki power x-1 = 24

Answers

Answered by DhanyaDA
1
Hi friend!!

 {4}^{x} - {4}^{x - 1} = 24

 = {4}^{x} (1 - \frac{1}{4} ) = 24

 = {4}^{x} ( \frac{3}{4} ) = 24

 = {4}^{x} = 32

x = log_{4}(32)

x=log (2)^5 to the base 4

x= log (4)^(5/2) to the base 4.

using power law of logarithm, we get

x=5/2


I hope this will help you ;)

mishra15mayank: How first two lines solve
DhanyaDA: 4^(x-1)=4^x/4
DhanyaDA: then, i took 4^x commom
DhanyaDA: common*
mishra15mayank: I don't understand
HappiestWriter012: x = 5/2 you can write
HappiestWriter012: no need of log
Answered by HappiestWriter012
1

 {4}^{x}  -  {4}^{x - 1}  = 24
4^x - 4^x/4 = 24

4^x ( 1 - 1/4 ) = 24

4^x * 3/4 = 24

4^x = 24 * 4 / 3

4^x = 32

4^x = 2^5

4^x = (2^2 ) ^ 5/2

4^x = 4^5/2

x = 5/2

Hope helped!

mishra15mayank: mean of ^
HappiestWriter012: power
HappiestWriter012: 4 ^ x = 4 raised to the power x
mishra15mayank: I don't understand second line
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