Question

Find the sum of first 100 terms of an A.P Whose first term is 5 and the 100th term is 401

Answer 1

Answer:

406 is correct answer of this question

Answer 2

Sum = n/2(a+l) (a=5, n=100 and l = 401)

Sum = 100/2 ( 5 + 401)

Sum = 50 * 406

Sum = 20300


Ans. The sum is 20300

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