Functions Question 513
Question: $ f:R\to $ defined by $ f(x)=(x-1)(x-2)(x-3) $ is
Options:
A) one-one and into
B) one-one and onto
C) Many one and into
D) many-one and onto
Show Answer
Answer:
Correct Answer: D
Solution:
[d] Graphically, $ y=f(x)=(x-1)(x-2)(x-3), $ which is clearly many -one and onto.