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Question

Find the value of ‘t’ for which the polynomial, p(x)=x3+3x2+2x+t gives 3 as remainder when divided by (x1).

A
-4
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B
-3
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C
-5
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D
-2
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Solution

The correct option is B -3
We have been provided with the cubic polynomial with 3 as a remainder when divided by (x1).

Using the remainder theorem, the remainder when p(x) is divided by (x1) is p(1). The remainder is given to be equal to 3 therefore p(1)=3.

p(x)=x3+3x2+2x+t

p(1)=(1)3+3(1)2+2(1)+t

p(1)=1+3+2+t

3=6+t

t=3

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