Find whether 55 is a term of the AP: 7, 10, 13,--- or not. If yes, find which term it is.
Answers
Answered by
4
Answer:
a=7
d=3
therefore, ATQ; An=55
a+(n-1)d=55
7+(n-1)3=55
(n-1)3=55-7
(n-1)=48/3
n-1=16
=> n=17
therefore, the 17th term is 55
hope it will help u
Answered by
4
Answer:
an=a+(n-1)d
d=10-7=3
55=7+(n-1)*3
55=7+3n-3
55=4+3n
55-4=3n
51=3n
51/3=n
17=n
therefore the 17th term of AP is 55
hope its helpful
have a good day
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