Question

simplify :- 5^x+5^x-1+5^x+1 =775

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

Given:

5^x-1 + 5^x + 5^x+1 = 775

5^x.5^(-1) + 5^x + 5^x.5^1 = 775

Taking 5^x common,

5^x[5^(-1) + 1 + 5^1] = 775

5^x[1/5 + 6] =775

5^x[31/5] = 775

5^x = (775×5)/31

5^x = 25 × 5

5^x = 125

5^x = 5^3

x = 3.