which term of AP 21, 18, 15 ________ is zero?
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AP
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which term of ap 21,18,15 - is zero
ans is Ap
Answered by
1
Answer:
as a= 21 and common difference d=-3 put the last term l=an=0
therefore = an = a+ (n-1)d
= 0=21 + (n-1)(-3)
=0=21-3n+3
24=3n
therefore n=8
thus the 8th term is = 0 of this A.P
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