Grade 12Differential Calculus
is there any other method of finding onto into functions other than making graphs
is there any other method of finding onto into functions other than making graphs
1 Answer
Arun
Approved Tutor Answer7 Years agoA function is said to be onto if there exist an x for every y.
Hence to prove a function to be onto just solve the function for an x
Eg: f(x) = 3x + 5
Let f(x) = y = 3x + 5
x= (y-5)/3
Hence there exist a x for every y
And hence the function is onto
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