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If f(x)=x^3+bx^2+cx+d and 0 < b^2 < c, ...

If `f(x)=x^3+bx^2+cx+d and 0 < b^2 < c`, then in `(-oo,oo)`, (a) `f(x)` is a strictly increasing function (b) `f(x)` has local maxima (d) `f(x)` is a strictly decreasing function (d) `f(x)` is bounded

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RESONANCE DPP-CONTINUITY AND DIFFERENTIABILITY-All Questions
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