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Question

If a polynomial p(x) is divided by x−a then remainder is

A
p(0)
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B
p(a)
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C
p(a)
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D
p(a)f(0)
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Solution

The correct option is C p(a)
p(x)=(x-a)q(x)+r(x)
where q(x) is the quotient when f(x) is divided by x-a and r(x)
The Remainder Theorem says that we can restate the polynomial in terms of the divisor, and then evaluate the polynomial
x=a
hence putting it we get
p(a)=0*q(a)+r(a)
p(a)=r(a)
hence the remainder is p(a)


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