當(dāng)x 大于等于0時(shí),可以簡(jiǎn)化為sinx≥(-1/2)
x∈(π,7π/6),
當(dāng)x<0時(shí),可以簡(jiǎn)化為sinx小于等于(-1/2)
x∈(-π/2,-π/6)
設(shè)函數(shù)f(x)=xsinx(x∈R).若x∈(-π/2,3π/2),且滿足f(x)≥(-1/2)x,求x的取值范圍
設(shè)函數(shù)f(x)=xsinx(x∈R).若x∈(-π/2,3π/2),且滿足f(x)≥(-1/2)x,求x的取值范圍
數(shù)學(xué)人氣:101 ℃時(shí)間:2020-04-21 19:48:25
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