J's answer to Angelina's Secondary 4 A Maths Singapore question.
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From part ii) , you've shown that the only real solution is u = 2. Since u = 3^x, then 3^x = 2. x = log3(2) = ln2/ln3 (or lg2/lg3) ≈ 0.631 (3.s.f)
Date Posted:
4 years ago
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