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Beyond Horizon Set 4 Paper 1 · Q15

Paper 1Algebra

Find the complete set of values of the constant cc for which the cubic equation

x3−3x+c=0x^3-3x+c=0

has three distinct real solutions.

A0<c<20<c<2
B−2<c<0-2<c<0
C−2<c<2-2<c<2
Dc>−2c>-2
Ec<2c<2
Fc<0c<0

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