If R is the set of all real numbers, what do the cartesian products `R xx R and R xx R xx R` represent?

If R is the set of real numbers and Q is the set of rational numbers, then what is R – Q ?

If r is a real number |r| lt 1 and if a= 5(1-r) , then

R is the set of real number . Define the function f: R to R by f (x ) =x^2 + 3 Draw the graph of f(x)

R is the set of real number . Define the function f :R to R by f (x ) =x^2 + 3 find f(-1) and f(2)

S is the set of all first n natural numbers. A relation R is defined as R= {(x,x)//x e S} . Is R reflexive? Is RSymmetric? Is R transitive?

Let R be the set of real numbers. Statement 1: A={(x,y) in R xx R : y-x is an integer} is an equivalence relation on R. Statement 2: B= {x,y} in Rxx R : x=alpha y for some rational number alpha } is an equivalence relation on R.

Let R be the set of real numbers. Define the real function f: R to R by f(x)=x+10 and sketch the graph of this function.

If P={a,b,c} and Q={r}, form the sets P xx Q and Q xx P .