The function `f:R rarr R` defined as `f(x)=(x^(2)-x+1)/(x^(2)+x+1)` is

the function f:R rarr R defined as f(x)=x^(3) is

The function f:R rarr R defined as f(x) = x^3 is:

f:R rarr R defined by f(x)=x^(2)+5

The function f:R rarr R defined as f(x)=(3x^(2)+3x-4)/(3+3x-4x^(2)) is :

The function f:R rarr R ,defined as f(x)=(x^(2)-x-21)(x^(2)-x-39) .Which of the following is (are) correct?

The function f:R rarr R is defined by f(x)=3^(-x)

The function f: R rarr R defined as f (x) = x^(2) + 1 is:

f:R rarr R defined by f(x)=(x^(2)+x-2)/(x^(2)+x+1) is

f:R rarr R defined by f(x)=(x^(2)+x-2)/(x^(2)+x+1) is: