the first term and the common difference of an a.p are 10 and 5 respectively.find sum of first 30 terms of a.p.
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Answered by
0
Answer:
246
Step-by-step explanation:
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2
Step-by-step explanation:
Given,a=10
d=5,n=30
S = n/2[2a+(n-1)d]
³⁰
= 30/2[2×10+(30-1)5]
=15[20+29×5]
=15[20+145]
=15×165
=2475
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