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If 3^2x+1=81, what is the value of x? x=1/4 x=1/2 x=3/2 x=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
asked 220k views
1 vote
If 3^2x+1=81, what is the value of x?

x=1/4
x=1/2
x=3/2
x=2/3

asked
User Stephen Higley
by
7.9k points

1 Answer

4 votes
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
answered
User Gianna
by
8.3k points
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