What does it mean for a function f:R→R to be surjective?1 pointFor every y in the codomain, there is an x in the domain such that f(x)=y.For every y in the codomain, there is no x in the domain such that f(x)=y.For every y in the codomain, there is exactly one x in the domain such that f(x)=y.For every x in the domain, there is exactly one y in the codomain such that f(x)=y.

If R denotes the set of all real numbers then the function f : R → R defined f (x) = [x] isOne-one onlyOnto onlyBoth one-one and ontoNeither one-one nor onto

The function f : R → R defined by f (x) = ex is OntoMany - oneOne - one  and into Many one and onto

.... is a function whose domain is the set of natural numbers and codomain is the set of real of numbers*1 pointSeries of real numbersfunction of real variableSequence of real numbersNone

Let f be a function such that f: N*N -> N such that:If (x,y) !=(0,0),then f(x,y) = gcd(x,y).if (x,y) = (0,0),then f(x,y) = 0.Is f surjective only,injective only,bijective,or none of these options?

f: R+→R defined by f (x)=2x, x∈ (0,1), f (x) = 3x, x∈ [1,∞) is one -one, onto neither one-one nor onto  one-one, not onto onto