Find the sum of 3+7+11+...... +199
Answers
Answered by
16
Answer:
5050
Step-by-step explanation:
d=7-3=4 a=3 l=199
an=a+(n-1)d
199=3+(n-1)4
196/4=n-1
49=n-1
n=50
Sn=n/2(a+l)
=50/2(3+199)=25×202
=5050
Answered by
4
Answer:5050
Average×total no. Of terms =sum
No. Of terms = 199-3/4 +1
Average=199+3/2
Step-by-step explanation:
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