已知函数y=2asin^2x-acos^2x+a+b的定义域为【0,π\2】,值域为【-5,1】,求常数a,b的值本人急用,
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![已知函数y=2asin^2x-acos^2x+a+b的定义域为【0,π\2】,值域为【-5,1】,求常数a,b的值本人急用,](/uploads/image/z/1265424-24-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0y%3D2asin%5E2x-acos%5E2x%2Ba%2Bb%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BA%E3%80%900%2C%CF%80%5C2%E3%80%91%2C%E5%80%BC%E5%9F%9F%E4%B8%BA%E3%80%90-5%2C1%E3%80%91%2C%E6%B1%82%E5%B8%B8%E6%95%B0a%2Cb%E7%9A%84%E5%80%BC%E6%9C%AC%E4%BA%BA%E6%80%A5%E7%94%A8%2C)
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已知函数y=2asin^2x-acos^2x+a+b的定义域为【0,π\2】,值域为【-5,1】,求常数a,b的值本人急用,
已知函数y=2asin^2x-acos^2x+a+b的定义域为【0,π\2】,值域为【-5,1】,求常数a,b的值
本人急用,
已知函数y=2asin^2x-acos^2x+a+b的定义域为【0,π\2】,值域为【-5,1】,求常数a,b的值本人急用,
y=2a*(1-cos2x)/2-a(1+cos2x)/2+a+b
=-(3a/2)cos2x+2a+b
0