Question

9) Find the value of x ,if 5^x = 625. Also find 3^x and 2^x-1 =

Answer 1

Answer:

x= 4

Step-by-step explanation:

5 ^x = 625

5² = 25

5³ = 125

5⁴ = 625

so, x = 4

Now, 3⁴ = 81

and 2⁴-1 = 16-1

= 15

Hope it helped you.....

Answer 2

Step-by-step explanation:

log x 625 = -4 [removing logarithm]

=> 5^4 = (1/x) ^4

=> 5= 1/x [ Powers are same, bases are equal]

=> x = 1/5 Ans.