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Q.

f:RR, fx=x3-3x2+6x-5 is

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a

One - One and onto

b

Onto but not one - one

c

Neither one - one nor onto

d

One - one and into

answer is A.

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Detailed Solution

 fx=x3-3x2+6x-5 f'x=3x2-6x+6=3x2-2x+2=3x-12+1>0 f(x) is an increasing function f is one - one. fx is odd degree polynomial, f(x) is onto

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f:R→R, fx=x3-3x2+6x-5 is