find the sum 3+5+9+......+n terms
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Answered by
1
this is not any AP so we cannot find the sum of n terms
ankushp20043d:
no in correct
Answered by
1
Answer:
Step-by-step explanation:
sn=n/2(2a+(n-1)d
a=3 d=2
Sn=n/2(6+2n-2)
=n/2(2)(3+n-1)
=n(2+n)
=2n+n^2
Sn=2n+n^2
how is this an ap when d is different
sry there is another formula
and i have used another
wait i will make it correct
ooooo
correct it
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