Q2 of 89 Page 49

Justify whether it is true to say that forms an AP as a2 - a1 = a3 - a2

False





Clearly, the difference of successive terms in not same, all though, a2 - a1 = a3 - a2 but a4 - a3 = a3 - a2 therefore it does not form an AP.


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1

Which of the following form of an AP? Justify your answer.

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For the AP - 3, - 7, - 11, … can we find directly a30 - a20 without actually finding a30 and a20 reason for your answer.

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