TMUA 2018 Paper 1 Q9 — Worked Solution

P1·Differentiation, Algebra & Surds·5.5Official · 2018 · Q9

cubic-distinct-rootsstationary-pointssign-of-local-extrema

Find the complete set of values of the constant

c

for which the cubic equation

2 x^{3} - 3 x^{2} - 12 x + c = 0

has three distinct real solutions.

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