Answer:
36
Step-by-step explanation:
Answer:
1st option
Step-by-step explanation:
We are summing the expression for n = 1 to n = 4 , that is
+ + +
1 ! = 1, 2! = 2 × 1 = 2 , 3! = 3 × 2 × 1 = 6 , 4! = 4 × 3 × 2 × 1 = 24 , then
+ + +
= 1 + 1 + +
You're trying to find constants
such that
. Equivalently, you're looking for the least-square solution to the following matrix equation.
To solve
, multiply both sides by the transpose of
, which introduces an invertible square matrix on the LHS.
Computing this, you'd find that
which means the first choice is correct.
3 cups= 15 people
60/15= 4
4*3=12
Lenny needs 12 cups of sauce
1 + -4
2 + -5
3 + -6
4 + -7