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Beyond Horizon Set 2 Paper 1 · Q14

Paper 1Algebra

The equation in xx

8x4−16x3+8x2+k=08x^4-16x^3+8x^2+k=0

has four real solutions:

Awhen −30<k<4-30<k<4
Bwhen 4<k<304<k<30
Cwhen −2.5<k<0-2.5<k<0
Dwhen 0<k<2.50<k<2.5
Ewhen 0<k<0.50<k<0.5
Fwhen −0.5<k<0-0.5<k<0

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