Question

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.​

Answer 1

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

Answer 2

Answer:

Answer is 670

Step-by-step explanation:

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