Question

If 5^n-1 * 25^n-2 =125 ,find the value of n

Answer 1

Answer:

5^n-(1×25^n)-2=125

5^n-25^n-2=125

5^n-25^n=125+2

-20^n=127

-20^n= 127

THERE IS A RULE WHEN THE POWER IS 'N',

R^N=X

HERE,-20=R,

n=N,

127=X

SO,

R^N=X

-20^n=127

Put 1 in the place of -20 bcoz 1 raised to the power anything is 1.

1^n=-127/20

1^n= -6.25

As we told before 1 raised to anything is 1.

here R^N=X

R=1,N=n,X=-6.25

So, n=1

1 raised to anything is 1.