find the number of terms in the AP 18, 15 1/2 13,...... - 47
drushasangwan:
What is this 15 1/2 13
No comma?
Answers
Answered by
33
Answer:
Step-by-step explanation:
a=18,d=-5/2 an= -47
An=-47
a+(n-1)d=-47
18+(n-1)-5/2=-47
(n-1)-5/2=-65
(n-1)=-65×-2/5
(n-1)=13×2
n=26+1
n=27
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