Math, asked by mohmmedsufiyanali19, 1 year ago

in an ap if a =20 d= 40 n=10 find sn

plz solve plz plz quickly as possible as ​

Answers

Answered by viraj9123
5

sn = n/2(2a+(n-1))d

sn =10/2(2×20+(10-1))40

sn=5(40+360)

sn=5×400

sn=2000


mohmmedsufiyanali19: thanks
Answered by Anonymous
4
Sn = n/2{2a+(n-1)d}
= 10/2{2×20+(10-1)40
= 5{40+9×40}
=5(40+360)
=5×400
=2000

mohmmedsufiyanali19: sorry next time i will mark as brainlist to you
mohmmedsufiyanali19: Thanks both of you has answer
viraj9123: thanks for marking me as brainliest
mohmmedsufiyanali19: u r most welcome
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