求值域,(1)y=2x平方+4x-7/(x+1)平方+2 (2)y=5x-1/4x+2
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![求值域,(1)y=2x平方+4x-7/(x+1)平方+2 (2)y=5x-1/4x+2](/uploads/image/z/2556718-70-8.jpg?t=%E6%B1%82%E5%80%BC%E5%9F%9F%2C%EF%BC%881%EF%BC%89y%3D2x%E5%B9%B3%E6%96%B9%2B4x-7%2F%28x%2B1%29%E5%B9%B3%E6%96%B9%2B2+%282%EF%BC%89y%3D5x-1%2F4x%2B2)
求值域,(1)y=2x平方+4x-7/(x+1)平方+2 (2)y=5x-1/4x+2
求值域,(1)y=2x平方+4x-7/(x+1)平方+2 (2)y=5x-1/4x+2
求值域,(1)y=2x平方+4x-7/(x+1)平方+2 (2)y=5x-1/4x+2
y=2x平方+4x-7/(x+1)平方+2
=2(x+1)^2-9/(x+1)平方+2
=2- 13/(x+1)平方+2
>=-5/4
y=5x-1/4x+2
x≠-1/2
(1)大于等于-9
(2)全体实数