Find the sum of the series 1 + 1 2 + 1 3 + 1 4 + 1 6 + 1 8 + 1 9 + 1 12 + ⋯ where the terms are the reciprocals of the positive integers whose only prime factors are 2s and 3s.
Find the sum of the series 1 + 1 2 + 1 3 + 1 4 + 1 6 + 1 8 + 1 9 + 1 12 + ⋯ where the terms are the reciprocals of the positive integers whose only prime factors are 2s and 3s.
Solution Summary: The author explains that the sum of the geometric series is 3. The terms are the reciprocals of positive integers whose prime factors are 2 S and 3 S.
Consider the following system of equations, Ax=b :
x+2y+3z - w = 2
2x4z2w = 3
-x+6y+17z7w = 0
-9x-2y+13z7w = -14
a. Find the solution to the system. Write it as a parametric equation. You can use a
computer to do the row reduction.
b. What is a geometric description of the solution? Explain how you know.
c. Write the solution in vector form?
d. What is the solution to the homogeneous system, Ax=0?
2. Find a matrix A with the following qualities
a. A is 3 x 3.
b. The matrix A is not lower triangular and is not upper triangular.
c. At least one value in each row is not a 1, 2,-1, -2, or 0
d. A is invertible.
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