9/13/2014
The
4th
term of an arithmetic series is 16 whereas the 13th
term is 43. Find the 20th
term.
Scroll down for the solution.
9/13/2014
Solution.
Since
the 4th
term of the arithmetic series is 16 and the 13th
term is 43,
a13 = a4 + 9d → 43 = 16 + 9d → d = 3
We
need the 20th
term, so that a20
= a4
+
16d
= 16 + 16·3
= 64