Question

11,15,19 ........IS 250 FIND THE SUM OF CERTAIN TERMS?

Answer 1

hyy friend here is your answer______________________

A.p.:=11,15,19-----is250
a=11 , d=a2-a1 , n=250
=15-11
=4

sn=n/2[2a+(n-1)×d]
sn=250/2[2×11+(250-1)×4]
sn=125[22+249×4]
sn=125[22+996]
sn=125×1018
sn=127250

hope it will help you
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palak shrivastava