Math, asked by likerprem909, 5 months ago

find the sum of series 4,+2,0,-2,-4......upto 20th term

Answers

Answered by kshariharan

0

Answer:

sum of the series = -300

Step-by-step explanation:

it is an A.P series

sum=1/2(2*a*n + n*(n-1)*d)

given, a=4,d=-2,n=20

sum=1/2(2*4*20 + 20*(20-1)*-2) = 1/2(160-760) = 1/2(-600) = -300

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