1.

Let h(x)=f(x)-a(f(x))^(2)+a(f(x))^(3) for all real xh(x) increases as f(x) increases for all x if

Answer»

`a in(0.3)`
`a in[-2,2]`
`a in[3,OO)`
`a in [2,oo]`

ANSWER :A


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