formula of Sn ..
AP.....
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sn =n/2(2a+n-1)d.......
Destroyer48:
nope it's the wrong one
u marked the wrong Brainliest answer!!
the other one has given the right answer!!
yup this one is wrong..
ya
Sn=n/2[2a+(n-1)]d
hm
no its wrong!!
n/2[2a+(n-1)d] is the right one!!
Answered by
1
n/2 ( 2a + (n-1)d)
n number of terms
n number of terms
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