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secondary 3 | A Maths
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A math indices
➗"2^(14)" at both sides of equation
2 - 1 = 1 = 2^(-x-14) = 2⁰
x + 14 = 0
x = -14 (Ans)
(ii)
➗"5^(10)" at both sides of equation
5- 1 = 4 = 4•5^(-x-10) = 2²
x + 10 = 0
x = -10 (Ans)
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