Let \( f(x)=\sin ^{3} x+\lambda \sin ^{2} x,-\frac{\pi}{2}x\frac{\p...

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Let \( f(x)=\sin ^{3} x+\lambda \sin ^{2} x,-\frac{\pi}{2}x\frac{\pi}{2} \). Find the
\( \mathrm{P} \) intervals in which \( \lambda \) should lie in the order that \( f(x) \) has

WV exactly one minimum and exactly one maximum.
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