Answer:
Just kidding
Step-by-step explanation:
I dont know
Answer to number 16 is 27 and 17 is 2
9514 1404 393
Answer:
C, D
Step-by-step explanation:
It can work to see what sequence each defines:
A) -8, -1, 6, ...
B) -15, -8, -1, ...
C) -22, -15, -8, ...
D) -22, -15, -8, ... . . . . matches C
E) -29, -22, -15, ...
The two that define the same sequence are ...
C) f(x) = 7x -29
D) a1 = -22, a(n+1) = an +7
Answer:
Step-by-step explanation:
<u>Find the sum:</u>
- 1/2n(n+1) + 1/2(n+1)(n+2) =
- 1/2(n² + n) + 1/2(n² + 3n + 2) =
- 1/2(n² + n + n² + 3n + 2) =
- 1/2(2n² + 4n + 2) =
- n² + 2n + 1 =
- (n + 1)²
Proved
