How do you find the term n=11, given the arithmetic sequence $a_1=5/2$ and d=-3/2?

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Answer 1 · 2016-11-03T21:48:54

$T_11 =-12 1/2$

In an A.P., the general term is given by

$T_n = a_1 + (n-1)d" "larr$ substitute for $a_1, d and n$

$T_11 = 5/2 + 10 xx (-3)/2$

$T_11 = 2 1/2 +(-15)$

$T_11 = -12 1/2$

How do you find the term n=11, given the arithmetic sequence a_1=5/2a_1=5/2 and d=-3/2?