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Question

The remainder obtained when the polynomial 1+x+x3+x9+x27+x81+x243 is divided by (x−1) is

A
1
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B
4
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C
0
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D
7
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Solution

The correct option is D 7
f(x)=1+x+x3+x9+x29+x81+x243
the remainder obtained by f(x) when
divided by x1
is f(1) by remainder theorem
f(1)=7
So, remainder is 7

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