5. (6 points) Find the sum of the series represented by:
∑3 − 5 6 =1

-9

Step-by-step explanation:

split the sequence to 3∑i - ∑5

the first is use formula

∑i = i*(i+1)/2

and ∑5 = 5i

subtract

6*7/2 - 5*6 = -9

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of