which of the following sequence is not in the arithemetic progression. 1) 3,3,3...... (2) 2,2,2........(3) 3,5,8,12,20........
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Answer:
answer is (3): 3,5,8,12,20.....because their common difference is not same
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Answer:
1) 3,3,3,......
a=3, d=a2-a1=3-3=0. & so on.
It is in Arithmetic Progression.
2) 2,2,2,......
a=2, d=a2-a1=2-2=0. & so on.
It is in Arithmetic Progression.
3) 3,5,8,12,20,......
a=3, d=a2-a1=5-3=2.
d=a3-a2=8-5=3.
d=a4-a3=12-8=4.
d=a5-a4=20-12=8. & so on.
It is not in Arithmetic Progression.
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