Answer to Question #92538 in Calculus for Vaibhavi Desai

Question #92538

QUESTION 1

Use the method of First Principles to find f'(x), given that

f(x) = x^2 + 2x

Expert's answer

"f'(x)=lim_{h\\to 0}\\frac{(x+h)^2+2(x+h)-x^2-2x}{h}=lim_{h\\to 0}\\frac{2xh+2h+h^2}{h}=lim_{h\\to 0}(2x+2+h)=2x+2"

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