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blsea [12.9K]
3 years ago
12

Find the remainder when x^100 - x^99 + x^98 − · · · − x + 1 is divided by x + 1.

Mathematics
2 answers:
Svetach [21]3 years ago
6 0

Answer:

The remainder is 101.

Step-by-step explanation:

We are dividing:

(x^{100}-x^{99}+x^{98}...-x+1)\div(x+1)

By the Polynomial Remainder Theorem, if we are dividing a polynomial P(x) by a binomial in the form (x - a), the our remainder will be P(a).

The divisor is (x + 1). Therefore, our a = -1.

Then the remainder will be:

P(-1)

We can rewrite our polynomial as:

P(x)=-(x^{99}+x^{97}...+x^3+x)+(x^{100}+x^{98}...+x^2)+1

Each of the parentheses contain fifty terms. -1 to any odd power is -1, and -1 to any even power is 1. Therefore:

P(-1)=-(-50)+(50)+1

Evaluate:

P(-1)=101

The remainder is 101.

Vikki [24]3 years ago
3 0

Answer:

The Answer is 101

Step-by-step explanation:

101 is how much is remaining

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