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solve-2-5x-20-1-




Question Number 171841 by Mikenice last updated on 21/Jun/22
solve:  2^((5x−20)) =1!
$${solve}: \\ $$$$\mathrm{2}^{\left(\mathrm{5}{x}−\mathrm{20}\right)} =\mathrm{1}! \\ $$
Answered by puissant last updated on 23/Jun/22
⇒ (5x−20)ln2 = 0  ⇒ 5x−20=0  ⇒ x=4..
$$\Rightarrow\:\left(\mathrm{5}{x}−\mathrm{20}\right){ln}\mathrm{2}\:=\:\mathrm{0} \\ $$$$\Rightarrow\:\mathrm{5}{x}−\mathrm{20}=\mathrm{0} \\ $$$$\Rightarrow\:{x}=\mathrm{4}.. \\ $$

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