已知函数f(x)=a{2sin(x/2)+sinx}+b ,求(1)当a=1时,f(x)的单调递减区间拜托各位了 3Q
问题描述:
已知函数f(x)=a{2sin(x/2)+sinx}+b ,求(1)当a=1时,f(x)的单调递减区间拜托各位了 3Q
已知函数f(x)=a{2sin(x/2)+sinx}+b ,求 (1)当a=1时,求f(x)的单调递减区间 (2)当a
数学人气:438 ℃时间:2019-09-04 04:21:36
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﹙1﹚当a=1时,f(x)=√2sin(x-π/4)+b+1;则此时的单调递减区间为[2kπ+3π/4,2kπ+7π/4]; ﹙2﹚∵f(x)=a{2sin(x/2)+sinx}+b=a×√2sin(x-π/4)+b+a ∵x∈[0,π],∴x-π/4∈[-π/4,3π/4] ∴sin(x-π...
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﹙1﹚当a=1时,f(x)=√2sin(x-π/4)+b+1;则此时的单调递减区间为[2kπ+3π/4,2kπ+7π/4]; ﹙2﹚∵f(x)=a{2sin(x/2)+sinx}+b=a×√2sin(x-π/4)+b+a ∵x∈[0,π],∴x-π/4∈[-π/4,3π/4] ∴sin(x-π...