In an A.P., the sum of the first 3 terms is 33 and the sum of the first 5 terms is 50 . find hthe sum of first 20 terms.
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5
Answer:
Step-by-step explanation: Find the sum of the first 20 terms of the arithmetic series if a1=5 and a20=62 .
S20=20(5 + 62)2S20=670
Answered by
0
Answer:
Answer is 670
Step-by-step explanation:
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