Approximate the area under the graph of $f(x)=2 x^{2}-1$ from $x=1$ to $x=5$ and above the $x$-axis, using four rectangles. Let the height of each rectangle be the function value at the midpoint of the interval.

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The Answer of Approximate the area under the graph of $f(x)=2 x^{2}-1$ from $x=1$ to $x=5$ and above the $x$-axis, using four rectangles. Let the height of each rectangle be the function value at the midpoint of the interval.

Approximate the Area Under the Graph Of f(x)=2x2−1f(x)=2 x^{2}-1f(x)=2x2−1 From x=1x=1x=1 To x=5x=5x=5

Approximate the Area Under the Graph Of $f(x)=2 x^{2}-1$ From $x=1$ To $x=5$