Nazrul pose la question : f : R to R is a function which is defined by f(x)=(2x+2)/(x-1).
Is f(x) an onto function? Please explain.
What is the range of this function?
Thank you very much for your previous help. Harley Weston lui répond.
Karel Marek pose la question : Math Is Book 6 (Ebos/Tuck) question 5(b) gives a surprising answer at the back of the book..
The question is: Indicate the domain and range for this: y = sqr(x-9) (Square root of)
The answer for the domain is x>=9 which is not surprisingly, but the range is y>=0, yER ... which I could understand if you were not allowed to transform the equation into x as the subject..
But all example on the facing page DO TRANSFORM the equation at will with x and/or y as the subject..
Can you explain this... ??
Chris Fisher lui répond.
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Centrale des maths reçoit une aide financière de l’Université de Regina et de The Pacific Institute for the Mathematical Sciences.