find the sum of a first 31 even terms in an AP
Answers
Answered by
1
Answer:
992
Step-by-step explanation:
Sn=n/2+(2a+(n-1)d)
where n=31
a=2
d=2
Answered by
0
Answer:
a=2 , d=2 n=31, Sn=?
Step-by-step explanation:
Sn=n/2[2a+(n-1)]d
S31=31/2[2*2+(31-2)]*2
=31/2 [4+29] *2
=31/2*33*2
=31/2*66
=31*33
=1023
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