Mohon bantuannya kakak, Abang, dan teman-teman.
Penjelasan dengan langkah-langkah:
[tex]4. \: {( \frac{1}{5}) }^{8x - 14} = 125 \\ {( {5}^{ - 1} )}^{8x - 14} = {5}^{3} \\ {5}^{ - 8x + 14} = {5}^{3} \\ - 8x + 14 = 3 \\ - 8x = - 11 \\ x = \frac{11}{8} [/tex]
[tex]5. \: {2}^{2x + 9} = 4 \sqrt{2} \\ {2}^{2x + 9} = {2}^{2} \times {2}^{ \frac{1}{2} } \\ {2}^{2x + 9} = {2}^{2 + \frac{1}{2} } \\ {2}^{2x + 9} = {2}^{ \frac{5}{2} } \\ 2x + 9 = \frac{5}{2} \\ 4x + 18 = 5 \\ 4x = - 13 \\ x = - \frac{ 13}{4} [/tex]
