To do this using a lefthand Riemann sum, we compute $L_7={\displaystyle \underset{i=s}{\overset{e}{}}}f(a+ix)x$ where

$s=$

$e=$

$x=$

$a+ix=$

$f(a+ix)=$

Using your calculator to evaluate the summation, we find that $L_7=$

To do this using a righthand Riemann sum, we compute $R_7={\displaystyle \underset{i=s}{\overset{e}{}}}f(a+ix)x$ where

$s=$

$e=$

$x=$

$a+ix=$

$f(a+ix)=$

Using your calculator to evaluate the summation, we find that $R_7=$