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Question

The polynomial P(x) = 4x3+7x2–5x+t, when divided by x + 1 gives 3 as the remainder. Find the value of ‘t’.


A

-3

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B

-4

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C

-5

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D

-6

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Solution

The correct option is C

-5


The remainder when P(x) is divided by x + 1 is 3, which simply means that P(-1) = 3, so upon solving we get 4(1)3+7(1)2+5(1)+t=3,
4+75+t=3
Hence, t=5


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