Discrete math question
consider functions f : {1,2,3,4}→{1,2,3,4,5,6}.
a) give an example of one such function (use 2-line notation). then say how many such functions there are and why your answer makes sense.
(b)give one example of such a function that is injective and one that is not. then say how many injective functions there are and why your answer makes sense.
(c) explain why there are no surjective functions with this domain and codomain.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

Let us take option c(-3x + 6i)(x + 2i)-3x² - 6xi + 6xi + 12i²-3x² + 12i²we know that i² = -1-3x² - 12option c is the answer