1. Find the sum of the following APs:
(i) 2,7,12,..., to 10 terms.
Answers
Answered by
2
Answer:
17,22,27,32,37,42,47,52,57,62
Answered by
3
Answer:
here: a=2 , n =10, d= 5
Sn = n/2(2a+(n-1)d)
= 10/2(2×2+(10-1)5)
= 5 (4+9×5)
= 5(4+45)
= 5×49
Sn = 245
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