Finding a closed-form expression for a sum.
What happens as n goes to infinity?
Geometric series in general The sum of a series is defined as a limit of partial sums, which means that when the ratio r satisfies −1

Agiven line has the equation 2x + 12y = −1. what is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)? y = ( )x + 9

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

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