Question

how to find one one and onto function​

Answer 1

Answer:

If you want to show that a function, say f, is 1-to-1, then you typically consider two values x1,x2 in the domain of f such that f(x1)=f(x2). From this, if you can derive that x1=x2, then your function is 1-to-1. Let's consider your first example. We would have f(x1)=4x1+1=4x2+1=f(x2).

Answer 2

Step-by-step explanation:

f is called onto or surjective if, and only if, all elements in B can find some elements in A with the property that y = f(x), where y B and x A. f is onto y B, x A such that f(x) = y. Conversely, a function f: A B is not onto y in B such that x A, f(x) y.

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