For an arithmetic sequence where a1 = 13 and the common difference is 3, find s7.
1 answer:
Answer:
Answer:
D ) 154
Step-by-step explanation:
a 1 = 13, d = 3;
S n = n/2 * ( a 1 + a n )
a 7 = a 1 + 6 d = 13 + 3 * 6 = 13 + 18 = 31
S 7 = 7/2 * ( 13 + 31 ) = 7/2 * 44 = 154
You might be interested in
Oh yeah the answer is 3 2/4 or 3 1/2 if you want to simplify.
Answer:
A quadrant 1
Step-by-step explanation:
hope it helps
It’s false!!! Hope this helped;)
The answer is eight and one.
Sum: 8 + 1=9
Product:8*1=8
