(1÷3)^(-2)+(1÷2)^(-2)+(1÷4)^(-2),it is exponent question,by (a^m×b^m)=(ab)^m..i wrote its answer=81, question is of 1 mark...its answer is 29 but logically I do correct so how many mark I gain???
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Hi ,
***********************************
We know that ,
( 1/a )^-n = aⁿ
***********************************
( 1/3 )^-2 + ( 1/2 )^-2 + ( 1/4 )^-2
= 3² + 2² + 4²
= 9 + 4 + 16
= 29
I hope this helps you.
: )
***********************************
We know that ,
( 1/a )^-n = aⁿ
***********************************
( 1/3 )^-2 + ( 1/2 )^-2 + ( 1/4 )^-2
= 3² + 2² + 4²
= 9 + 4 + 16
= 29
I hope this helps you.
: )
rvsharma75:
I say what marks I gain???
you may get 1/2 mark
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