Sum of first q terms of an AP is 162. Ratio of 6th term to its 13th term is 1:2 . Find first and 15th term of the AP.
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Answer:I might think sum of 9 term is 164
a=6
15th term =48
Step-by-step explanation:
(a+5d)/(a+12d)=1/2
2(a+5d)=1(a+12d)
2a+10d=a+12d
a-2d=0
a=2d
9/2(2a+(9-1)d)=162
9(4d+8d)=324
9×12d=324
12d=324/9
12d=36
d=3
a=2d
a=6
15th term=a+14d
x15=6+(14×3)
=6+42
=48
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