Math, asked by amoori781, 11 months ago

The sum of the 20 terms of an AP whose first term is 5 and cd is 4

Answers

Answered by rajarshipsycho

0

Answer:

86

Step-by-step explanation:

S = n/2(2a+ (n-1)d) =20/2(2*5 +(20-1)*4) =10(10 + 76) = 860

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