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Solve each equation (Isolating first)[tex]3[/tex] · [tex](\frac{1}{8})^{2x} = 12[/tex][tex]2[/tex] ·...
4 months ago
Q:
Solve each equation (Isolating first)[tex]3[/tex] · [tex](\frac{1}{8})^{2x} = 12[/tex][tex]2[/tex] ·[tex](\sqrt[3]{5})^{4x} = 50[/tex]
Accepted Solution
A:
[tex]3 \times {( \frac{1}{8} )}^{2x} = 12 \\ \Leftrightarrow {( \frac{1}{8} )}^{2x} = 4 \\ \Leftrightarrow {( {2}^{ - 3}) }^{2x} = {2}^{2} \\ \Leftrightarrow {2}^{ - 6x} = {2}^{2} \\ \Leftrightarrow - 6x = 2 \\ \Leftrightarrow x = - \frac{1}{3} \\ \\ 2 {\sqrt[3]{5}}^{4x} = 50 \\ \Leftrightarrow { \sqrt[3]{5} }^{4x} = 25 \\ \Leftrightarrow {5}^{ \frac{4x}{3} } = {5}^{2} \\ \Leftrightarrow \frac{4x}{3} = 2 \\ \Leftrightarrow 4x = 6 \\ \Leftrightarrow x = \frac{3}{2} [/tex]