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### Question of the Day: Calculus 1

The general Riemann Sum approximation of an integral takes the form

Where is the number of points/subintervals, and each subinterval is of uniform width .

Knowing this, imagine that the subintervals are not of uniform width.

Denoting a particular subinterval's width as ,

the integral approximation becomes

Which of the following parameters would give the closest integral approximation of the function:

?

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