Question

If a= 4, t20= 36 then find s20​

Answer 1

Answer : 400 ✔✔

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Solution :

Given that :

T20 = 36, a = 4, S20 = ?

As we know that :

Sn = n/2[ a + Tn ]

=> S20 = 20/2[ 4 + 36 ]

=> S20 = 10 × 40 = 400

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I hope it will help you ☺

Fóllòw Më ❤