We are asked to find the value of the expression:
3xy + 2x in the case where x = 2 and y = 3.
This is a case of what I might call "numeric substition for variables". It's a very important skill because it usually comes up at least once in many types...
The NPV of the project cost is 250000.
What is the NPV of a future return?
You have to discount the future returns because of the fact that a dollar today is going to be worth $1.05 next year, 1*(1.05)^2 after two years, and so on. So conversely getting a dollar...
First, notice that the series you wrote is
∑ (-3)(n) for n ∈ [0,5]
There is a general formula for the sum of a basic geometric series that you should know or learn.
Here's a hint: How can you simplify the product of (1-x) and a summation, for...