Which of the following is not in A P
a) 2,4,8,16 ....
b)-5,-1,3,7 ....
c)2, 5/2 ,3, 7/2, ....
d)2,2,2,2, ...
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Answer:
a)2,4,8,16.... is not an A.P
Step-by-step explanation:
a)2,4,8,16....
a=2
a2-a1=4-2=2
a3-a2=8-4=4
The following series is not an A.P
b)-5,-1,3,7.....
a=-5
a2-a1=-1+5=4
a3-a2=3+1=4
The following series is an A.P
c)2,5/2,3,7/2.....
a=2
a2-a1=5/2-2=(5-4)/2=1/2
a3-a2=3-5/2=(6-5)/2=1/2
The following series is an A.P
d)2,2,2,2......
a=2
a2-a1=2-2=0
a3-a2=2-2=0
The following series is an A.P
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