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Q.

How do you find x for log5 x = 4?

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a

10

b

625

c

425

d

100 

answer is B.

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Detailed Solution

The expression is log5 x = 4
So, x = (5)4
x = 54 = 625
(Number 5 raised to power & its logarithm base which is 4)
So, x = 625.

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How do you find x for log5 x = 4?