Find the number of terms in each of the following APs:
18,15 1/2 ,13.........-47
Answers
Answered by
8
an=-47
a=18
d=15-18
=(-3)
an=a+(n-1)d
-47=18+(n-1)-3.
-47-18=-3n+3
-65-3=(-3n).
-68=-3n
n=68/3
n=22.6....
a=18
d=15-18
=(-3)
an=a+(n-1)d
-47=18+(n-1)-3.
-47-18=-3n+3
-65-3=(-3n).
-68=-3n
n=68/3
n=22.6....
Answered by
2
2*1/2*x=18+47
therefore,x=no of terms=26
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