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Let f: R to R be definded by f(x)=(x^2...

Let `f: R to R` be definded by
`f(x)=(x^2-3x-6)/(x^2+2x+4)`
Then which of the following statements is(are) TRUE?

A

f is decreasing in the interval `(-2,-1)`

B

f is increasing in the interval (1,2)

C

f is onto

D

Range of f is `[-3/2,2]`

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