Find the sum of first 10 terms of an AP 3,15,27,39
Answers
Answered by
2
Answer:
use formula of sn=n/2(2a+(n-1) D
hope u understand
Answered by
1
Answer:
S10 =170
Step-by-step explanation:
put the formula Sn=n/2(2a+(n-1)d)
a=3 and d=12
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