find the 25th term of an ap whose 3rd term is 8 and 7th term is 20
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0
Answer:
A 25 = 86
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2
Answer:
a3=8,
a+2d=8-----(1)
a7=20,
a+6d=20----(2)
(2)-(1)
4d=12
d=3---(3)
substitute (3) in (1)
a+6=8
a=2
so 25th term that is
a+24d=a25
2+24*3=74
hence 25th term is 74.....
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