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8090 [49]
3 years ago
10

tex-formula">
If 81 came out, what was dropped in?
I have rewritten the problem to 3^x=81 but do not know how to solve it.
Mathematics
2 answers:
kogti [31]3 years ago
5 0
It is good equation. Look, that:
81 = 3 x 3 x 3 x 3 = 3^4.
So you have to solve:
3^x = 3^4 
exponents have to be the same, so
x=4
That's mean that A(4) = 81

tia_tia [17]3 years ago
3 0
A(x)=3^x=81\\
3^x=81\\
3^x=3^4\\
x=4


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