In Exercises 49 and 50, convince yourself that the equation is correct by summing up the first
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- Use the formula for the sum of the first ii terms of an arithmetic series to find the sum of the first eleven terms of the arithmetic series 2.5,4,5.5,arrow_forwardProve the formula for the sum of the first n terms of an arithmetic series: a+a+d+a+2d+a+n-1d=na+an2 where an=a+n-1d.arrow_forwardWhat is a geometric series?arrow_forward
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