Question

Q. No 38 Please Show the process

Answer 1

${3}^{4x} = {81}^{ - 1} \\ {81}^{x} = {81}^{ - 1} \\ x = - 1 \\ {10}^{ \frac{1}{y} } = 0.0001 \\ {10}^{ \frac{1}{y} } = {10}^{ - 4} \\ \frac{1}{y} = - 4 \\ y = - \frac{1}{4} \\ - x = 1\\ {2}^{ - x} . {16}^{y} \\ {2}^{1} . {2}^{ - 1} \\ = 1$