Question

The coefficient of x2 in (3x + x3) (x+1/x)?

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Answer 1

Answer:

4

Step-by-step explanation:

(3x+x^3) (x+1/x)

By using distributive property, we get

3x^2+3+x^4+x^2

So,

x^4+4x^2+3 is the simplified answer

So the coefficient of x^2 is 4

Answer 2

Answer:

(3x + x^3)(x + 1/x) = 3x^2 + x^2 + 3 + x^4 = 4x^2 + x^4 +3

Hence Coefficient of x^2 = 4