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find n and tn

0 votes

t1=20, d=-3/2 and Sn=108 1/2.

arthametic-mean
sequence-series

asked Mar 11, 2014 in ALGEBRA 1 by rockstar Apprentice

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1 Answer

0 votes

Substitute the values in above formula.

n th term is

For n = 7

For n = 62/3

.

answered Mar 28, 2014 by david Expert
edited Mar 28, 2014 by david

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