Question

(iii) What is the sum of the first 20 terms of an A.P., if a = 4 and t 20 =36 ? (A) 40 (B) 200 (C) 400 (D) 800

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

the answer is

Step-by-step explanation:

the first 20 terms is 400 hope it's helpful for you ok