Answer :

Formula Used.


dn = an + 1 – an


an = a + (n–1)d


The sequence of natural numbers which are multiple of 3 or 5


in increasing order


Is 3, 5, 6, 9, 10 ……


In the above sequence,


a = 3;


d1 = a2–a1 = 5–3 = 2


d2 = a3–a2 = 6–5 = 1


d3 = a4–a3 = 9–6 = 3


As in A.P the difference between the 2 terms is always constant


The difference in sequence is not same .


The above sequence is not A.P


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