Questions
Which of the following functions is not onto
a
f:R→R,f(x)=3x+4
b
f:R→R+,f(x)=x2+2
c
f:R+→R+,f(x)=x
d
none of these
detailed solution
Correct option is B
The function f(x)=3x+4 is onto as for y ∈R,fy−43=y The function f:R+→R+,f(x)=x is onto as for y∈R+, fy2=y⋅f:R→R+,f(x)=x2+2 is not onto as 1∈R+ has no pre-image.Talk to our academic expert!
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Which of the following statements are incorrect?
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