Question

3^x - 3^x-1=18 find the value of x^x​

Answer 1

Answer:

27

Step-by-step explanation:

3^x - 3^(x-1) = 18

3^x - (3^x/3) = 18

Let 3^x = a

a - a/3 = 18

2a = 54; a = 27

3^x = 27

x = 3

x^x = 3^3 =27