Math, asked by lchandu279, 9 months ago

if n term of A. P is An=4-7n find the sum of first 20th term

Answers

Answered by sukesh1215

0

Answer:

-136

Step-by-step explanation:

lf an=4-7n

so a20=4-7(20)

a20=4-140

a20=-136

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