Let S be the set of all non-negative multiples of 9 (0, 9, 18, 27 and so on). S is closed with respect to which ordinary operation?
A) multiplication
B) square root
C) division
D) subtraction
E) cube root
A) multiplication
Mathematics
You might also like to view...
Use the method of undetermined coefficients to solve the differential equation.
- 2
+ y = xe-5x - e-5x; 
= 0 and y = 0 when x = 0
A. y = 
ex - 
xex + 
xe-5x - 
e-5x
B. y = 
ex + 
xex + 
xe-5x - 
e-5x
C. y = 
ex - 
xex + 
xe-5x + 
e-5x
D. y = - 
ex - 
xex + 
xe-5x - 
e-5x
Mathematics
Construct a truth table for the given compound statement.p ? ~(s ? c)
A. 
B. 
C. 
D. 
Mathematics
Graph the function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics
Let A = {q, s, u, v, w, x, y, z}, B = {q, s, y, z}, 
and 
Specify the following set.C ? D
A. {q, w, y} B. {q, y, z} C. ? D. {q, s, u, w, y, z}
Mathematics