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AP® Calculus AB-BC

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Left Riemann Sum

APCALC-NXARUL

Use a left Riemann sum to approximate:

$$\int _{ 1 }^{ 5 }{ \cfrac { 1 }{ x } } dx$$

...with $4$ equal subintervals.

A

$\ln5$

B

$\cfrac{25}{12}$

C

$\cfrac{77}{60}$

D

$\cfrac{107}{60}$