Multiple choice maths indices negative indices law of indices laws of indices The value of ${ \left[ { \left( { 3 }^{ 2 } \right) }^{ 2 } \right] }^{ -1 }$ is- $81$ $-81$ $-0.0123$ $0.0123$ Reveal answer Fill a bubble to check yourself D Correct answer Explanation $\cfrac { 1 }{ { \left( { 3 }^{ 2 } \right) }^{ 2 } } $ $\because (a^m)^n=a^{mn}$ $=\cfrac { 1 }{ { 3 }^{ 4 } }$$ =\cfrac { 1 }{ 81 }$$ =0.0123$