<img src="https://tex.z-dn.net/?f=A%28x%29%3D3%5E2" id="TexFormula1" title="A(x)=3^2" alt="A(x)=3^2" align="absmiddle" class="la

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3 years ago

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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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