abbydamaso5182 abbydamaso5182

02-01-2018
Mathematics

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The given series has six terms. what is the sum of the terms of the series? 17 + 25 + 33 + . . . + 57

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anchitthawi anchitthawi

02-01-2018

Sum of the terms of the series is

Sn = n/2 ( a1+an )

we have n= 6 , a1= 17, an = 57
so Sn = 6/2 ( 17+57) = 3(74) = 222

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