1/15,1/12,1/10,........to 11 terms.
Answers
Answered by
1
Step-by-step explanation:
a=1/15
d=1/12-1/15
d=1/60
n=11
an=a+(n-1)×d
a11=1/15+(11-1)×1/60
a11=7/30
S=n/2(a+an)
S=11/2(1/15+a11)
S=11/2(1/15+7/30)
S=3/10
Answered by
0
Step-by-step explanation:
- Here we have given a1 =1/15, a2=12, a3=1/10.
- Common difference d = a2-a1
- d= 1/12-1/15
- d =-1/60
- an =a+(n-1)d
- 11=1/15+(11-1)(-1/60)
- 11=1/15+(-1/6)
- 11=1/15-1/6
- 11=6-15/90
- 11=-9/90
- 11=-1/10
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