Approximating Areas with Riemann Sums

AP Calculus AB· difficulty 3/5

For an increasing function (regardless of concavity), the <strong> left </strong> Riemann sum is

A
$An overestimate$
B
$Always zero$
C
$An underestimate$
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D
$Exactly correct$

Explanation

Left endpoints give the smallest values when the function is increasing \to underestimate.

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