please help me guys it's urgent solve it in notebook both questions plzzz
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11. [ (1/3)^-2 - (1/2)^-3 +(1/4)^-1 ]^-1 / 5^-2
=> [3^2 - 2^3 + 4^1] / 5^-2
=>[9 - 8 + 4] / (1/5)^2
=>[5] / (1/5)^2
=>5/25 = 1/5
12. (-5)^(m+1) * (-5)^6 = (-1)^9 * 5^9
=> (-5)^(m+1)* (-5)^6 = (-1) * 5^9
=>(-5)^(m+1) * (-5)^6 = -5^9
=>(-5)^(m+1) = -(5^9)/(-5)^6
=>(-5)^(m+1) = -5^3
On comparing their powers
m +1 = 3
m=2
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