The sum of the first three term of an A. P. ,whose first term is 3 and common difference is 2 is
Answers
Answered by
1
Answer:
15
Step-by-step explanation:
a1 = 3
a2 = 5
a3 = 7
Sum of the three
= 3+5+7
= 15
Answered by
1
Answer:
a,a1,a2......
a=3
d=2
S3=n/2{2a+(n-1)d}
3/2{2*3 +(3-1)2}
3/2{6 +4}
3/2 *10
3*5
15
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