Question

Enter the correct letter to match each summation expression with the property or formula.

n
Σ
i=1
cai is equal to
. a
n(n + 1)(2n + 1)
6

n
Σ
i=1
i is equal to
. b
n(n + 1)
2

n
Σ
i=1
c is equal to
. c c
n
Σ
i=1
ai

n
Σ
i=1
i3 is equal to
. d cn

n
Σ
i=1
i2 is equal to
. e
n(n + 1)
2
2

Answer 1

Answer:

C B D E A

Im just gunna go ahead and send all the answers bro

For the Store with sales of 500 in first month just put (The sale for first month is $500.

The sale increases by $10 each month, as modelled by the equation: a_k=500+(k-1)10 = 131,400$)

The last one just copy and paste --> Distribute 2j to (j+3). Rewrite the summation as the sum of two individual summations. Evaluate each summation using properties or formulas from the lesson. The lower index is 1, so any properties can be used. The sum is 5,494,000.