$[-/4$ Points$]$

Use the form of the definition of the integral given in this theorem to evaluate the integral.

${\displaystyle \underset{0}{\overset{2}{}}}7xdx$

Find the width of each subinterval in terms of $n.$

$$ units ${?}^{\text{'}}$

Find the $\frac{?}{?}$ th endpoint in terms of $n.$

$x_1=$

Evaluate $f(x)=7x$ at the $\frac{?}{?}$ th endpoint.

$f(x_i)=$

Evaluate the integral.

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Need Help? $q,$