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Question

f(x)=x36x2+11x6x3 xR is a polynomial.

A
True
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B
False
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Solution

The correct option is B False
Given that f(x)=x36x2+11x6x3 xR
f(x)=x35x2x2+6x+5x6x3
f(x)=x3x2+6x65x2+5xx3
f(x)=x2(x1)+6(x1)5x(x1)x3
f(x)=(x1)(x25x+6)x3
f(x)=(x1)(x2)(x3)x3
x3
f(x) is undefined at x=3
A polynomial function has to be defined xR
f(x) is not polynomial function for all real x

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