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Let f(x) = x^3 + 4x and g(x) = -x^7 + 5x^4 - x^3 + 3x + 1. What is the coefficient of x^3 in the sum f(x) + g(x).

 Nov 1, 2020
 #1
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Just add LIKE terms.  If the powers of x are not the same then the terms are not LIKE terms.

 Nov 1, 2020

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