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3-x-2-x-65-x-




Question Number 204373 by esmaeil last updated on 14/Feb/24
3^x −2^x =65  x=?
$$\mathrm{3}^{{x}} −\mathrm{2}^{{x}} =\mathrm{65} \\ $$$${x}=? \\ $$
Answered by Frix last updated on 14/Feb/24
Obviously x=4  81−16=65
$$\mathrm{Obviously}\:{x}=\mathrm{4} \\ $$$$\mathrm{81}−\mathrm{16}=\mathrm{65} \\ $$
Commented by esmaeil last updated on 15/Feb/24
solution?
$${solution}? \\ $$
Commented by Frix last updated on 15/Feb/24
No method. If it′s not obvious you can only  approximate.
$$\mathrm{No}\:\mathrm{method}.\:\mathrm{If}\:\mathrm{it}'\mathrm{s}\:\mathrm{not}\:\mathrm{obvious}\:\mathrm{you}\:\mathrm{can}\:\mathrm{only} \\ $$$$\mathrm{approximate}. \\ $$

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