Math, asked by victora3713, 10 months ago

Find the sum of first 20 terms of the ap : 24, 21 ,18

Answers

Answered by Lokesh1845

0

Answer:

a=24

d=-3

n=20

S20=20/2(2×24+(20-1)×-3)

S20=10(48-57)

S20=10×-9

S20=-90

Answered by mohammedfahadfahad60

0

Step-by-step explanation:

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