How do you find $a_13$ for the arithmetic sequence -17, -12, -7, ...?

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Answer 1 · 2016-11-03T21:57:01

$T_13 = 43$

The general term of an A.P. is given by

$T_n = a_1 + (n-1)d" "larr$ we have $n=13, a_1 = -17, d = 5$

$T_13 = -17 + (12) xx 5$

$T_13 = -17 +60$

$T_13 = 43$

How do you find a_13a_13 for the arithmetic sequence -17, -12, -7, ...?