Sec. 8.1 (Day 2)

How many terms are there in the series  $\sum_{k=3}^{13}3k+1$  

• 13

• 11

• 10

Write 1 + 2 + 3 + ... + 10

using sigma notation

• $\sum_{d=1}^9d$

• $\sum_{d=1}^{10}d+1$

• $\sum_{d=1}^{10}d$

 $\ \ Evaluate\ the\ \exp ression:\ \ \ \ \sum_{k=1}^4k^3\$  

• 30

• 100

• 110

 $Evaluate:\ \ \sum_{a=2}^6\left(a^2+a\right)$  

• 70

• 110

• 90

Given the recursive formula, find the first four terms:
a_n = a_n-1 + 5
a₁ = -16

• -16, -21, -26, -31
• 5, -11, -27, -43
• -16, -80, -500, -200
• -16, -11, -6, -1

Write a recursive rule for the sequence 17, 1, -15, -31 . . .

• a_n = a_n-1 + 16
  a₁=17
• a_n = a_n-1 - 17
  a₁=17
• a_n = a_n-1 - 15
  a₁=17
• a_n = a_n-1 - 16
  a₁=17

Write an expression for: 1, 4, 7, 10, 13, ...

simplify this

• 1

• a

• a+1

• 1/a

 $\frac{\left(n+2\right)!}{n!}=$  

•  $n+1$  

•  $n^2+n+1$  

•  $2n+2$  

•  $n^2+3n+2$  

Given the recursive formula below, find the first five terms.

u₁ = 3

u_n = u_n-1 + 2

• 3, 5, 7, 9, 11

• 5, 7, 9, 11, 13