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Let \(f(x) = x^4-3x^2 + 2\) and \(g(x) = 2x^4 - 6x^2 + 2x -1\). Let a be a constant. What is the largest possible degree of \(f(x) + a\cdot g(x)\)?

 Mar 23, 2019
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I assume you may have meant to say smallest, as I have seen those kinds of questions before, so I will answer both.

 

For largest, because a is a constant, it cannot make the largest exponent any higher, so the answer is 4.

 

For smallest, we want to cancel some exponents, so we can multiply g(x) by -1/2 and add to get x^4 - 3x^2 + 2 - x^4 + 3x^2 - x + 1/2 = -x + 5/2, so the degree is 1.

 

Hoping this helped, 

asdf334

 Mar 23, 2019

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