# How do you find a formula for #sum_(r=0)^n r2^r# ?

Take note of this:

By signing up, you agree to our Terms of Service and Privacy Policy

By signing up, you agree to our Terms of Service and Privacy Policy

The formula for the sum ( \sum_{r=0}^{n} r \cdot 2^r ) is ( n \cdot 2^{n+1} - (n+1) ).

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you find the domain and range of #g(x)= 2/ (x-1)#?
- How do you simplify #5k+3k^3+7k+9k^3#?
- The perimeter of a square is 12 cm greater than that of another square. Its area exceeds the area of the other square by 39 sq cm. How do you find the perimeter of each square?
- What is the domain and range of #y= (4x^2 - 9) / ((2x+3)(x+1))#?
- How do you simplify #(10 - 4 * 13+ 19) div 23# using order of operations?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7