apabila 2^x di × 8^1/5 = 2^1/5, maka x sama dengan....

[tex] {2}^{x} \times {2}^{3 \times \frac{1}{5} } = {2}^{ \frac{1}{5} } \\ {2}^{x + \frac{3}{5} } = {2}^{ \frac{1}{5} } \\ \\ x = \frac{1}{5} - \frac{3}{5} \\ x = - \frac{2}{5} [/tex]