Question

if 2^n-7*5n^-4=1250,find the value of n​

Answer 1

2^n  -7 *5^n- 4 = 1250

2^n  -7 *5^n- 4 = 2 * 625

2^n  -7 *5^n- 4 = 2^1 * 5^4

Taking,  2^{n - 7} = 2^{1}  

⇒ n - 7 = 1

⇒ n = 1 + 7

⇒n = 8

Answer 2

Step-by-step explanation:

2n-7*5n-4=1250

=>2n-7*5n-4=2*625

=>2n-7*5n-4=21*54

on comparing values we get

taking 2n-7=21

n-7=1

n=1+7

n=8

Hope it will help you .❤