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f(x)=2sin(2x+2A+π/6)+1,A为常数,(1)当方程f(x)+a-1=0有解时,求a的取值范围
人气:198 ℃ 时间:2020-07-28 01:11:44
解答
-1<=sin(2x+2A+π/6)<=1
所以-1<=2sin(2x+2A+π/6)+1<=3
f(x)=-a+1
所以有解的-1<=-a+1<=3
-3<=a-1<=1
-2<=a<=2
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