kiaarviz6950 kiaarviz6950

25-10-2017
Mathematics

contestada

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

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

Respuesta :

brandonhoffmanoycm61 brandonhoffmanoycm61

25-10-2017

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

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