Question
For each function $u(x)$ in exercises, write the differential $d u$ in terms of the differential $d x$.$$u(x)=x^{2}+x+1$$
Step 1
The derivative of $x^{2}$ is $2x$, the derivative of $x$ is $1$, and the derivative of a constant is $0$. So, $\frac{du}{dx} = 2x + 1$. Show more…
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