Use Quotient Rule: To find the derivative of the function g(x)=x2+1x−5, we will use the quotient rule. The quotient rule states that if you have a function h(x)=g(x)f(x), then the derivative h′(x) is given by (g(x))2f′(x)g(x)−f(x)g′(x). Here, f(x)=x−5 and g(x)=x2+1.
Find f′(x): First, we need to find the derivative of f(x)=x−5, which is f′(x)=1, since the derivative of x is 1 and the derivative of a constant is 0.
Find g′(x): Next, we need to find the derivative of g(x)=x2+1, which is g′(x)=2x, since the derivative of x2 is 2x and the derivative of a constant is 0.
Apply Quotient Rule: Now we apply the quotient rule. We have f′(x)=1 and g′(x)=2x, so we plug these into the quotient rule formula to get g′(x)=(x2+1)2(1⋅(x2+1)−(x−5)⋅2x).
Simplify Numerator: Simplify the numerator of the derivative: g′(x)=(x2+1)2x2+1−2x2+10x.
Combine Like Terms: Combine like terms in the numerator: g′(x)=(x2+1)2−x2+10x+1.
Final Answer: The derivative g′(x) is now in its simplest form, so we have our final answer.
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