TMUA 2018 Paper 1 Q15 — Worked Solution

P1·Indices, Logarithms & Exponentials·6.0Official · 2018 · Q15

exponential-substitutionhidden-quadraticlogarithm-sum

Find the sum of the real solutions of the equation

3^{x} - (3)^{x + 4} + 20 = 0.

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