which of the following functions are one to one and onto?

0 ⤊

which of the following functions are one to one and onto?

a) f: R --> R, f(x) = 5x + 6
b) f: R --> R, f(x) = x^(3)
c) f: R --> R*R, f(x) = (x,x)
d) f: R --> R, f(x) = square root of x
e) f: Z*Z --> Z, f(m,n) = m - n

Here R and Z indicates Real numbers and integers, respectively.

2006-10-23 20:21:18 · 3 answers · asked by kenilabcl 1 in Science & Mathematics ➔ Mathematics

PROOVE ALL

2006-10-23 20:49:52 · update #1

3 answers

yes
yes
yes
no
no

2006-10-23 20:25:56 · answer #1 · answered by gjmb1960 7 · 0⤊ 0⤋

a,b,e are 1-1 and onto

2006-10-23 20:38:05 · answer #2 · answered by George Daoud 2 · 0⤊ 0⤋

a) one-one onto
b)one-one onto

2006-10-23 20:31:17 · answer #3 · answered by raj 7 · 0⤊ 0⤋