If 3^2x+1=81, what is the value of x?

x=1/4

x=1/2

x=3/2

x=2/3

Question

Mathematics

Kash

21 May, 08:10

If 3^2x+1=81, what is the value of x?

x=1/4

x=1/2

x=3/2

x=2/3

+3

Answers (1)

Know the Answer?

Christine Collins · Answer 1

3^ (2x+1) = 81

3^ (something) = 81

3^4=81. I know this because 3X3X3X3=81

If I know 3^4=81, then I need to find a solution to get 4 for my exponent.

Let's solve.

2x+1=4

2x=3

x=3/2

If 3^2x+1=81, what is the value of x?x=1/4x=1/2x=3/2x=2/3

If 3^2x+1=81, what is the value of x?

x=1/4

x=1/2

x=3/2

x=2/3