Math, asked by rajveerppp, 11 months ago

the first term and comman difference of a.p are -5 and 4 respectively.find sum of the first 40 term of a.p

Answers

Answered by Parvathyvarma

1

Answer: the answer is 2920

Step-by-step explanation:

It is explained in the image below

Attachments:

Answered by adityagangwar1826

0

Step-by-step explanation:

a=-5, d=4

S₄₀ = 40/2 {2(-5) + 39 (4)}

= 20 {-10+156}

= 20 × 146

= 2920

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