## MATHEMATICS FUNCTION QUIZ-7

As per analysis for previous years, it has been observed that students preparing for JEE MAINS find Mathematics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Mathematics due to their ENGINEERING background.

Furthermore, sections such as Mathematics are dominantly based on theories, laws, numerical in comparison to a section of Engineering which is more of fact-based, Physics, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.

Q1. Let f:N→N defined by f(x)=x2+x+1,x∈N, then f is
•  One-one onto
•  Many-one onto
•  One -one but not onto
•  None of these
Solution

Q2.

•  x2
•  x2-1
•  x2-2
•  x2+1
Solution

Q3.  If b2-4ac=0 and a>0, then domain of the function f(x)=log⁡{(ax2+bx+c)(x+1)} is
•

•

•

•

Solution

Q4.

•  [2, 12]
•  [-1, 1]
•  [1/3,24]
•  [6, 24]
Solution

Q5.

•

•

•

•

Solution

Q6. The domain of f(x)=log⁡|logex |, is
•  (0,∞)
•  (1,∞)
•  (0,1)∪(1,∞)
•  (-∞,1)
Solution

Q7.

• [-3,2]
•  [-3,2)
•  (-3,2]
•  (-3,-2)
Solution

Q8.Let R be a relation on the set of integers given by aRb⇔a=2k.b for some integer k. Then, R is
•  An equivalence relation
•  reflexive but not symmetric
•  Reflexive and transitive but not symmetric
•  Reflexive and symmetric but not transitive
Solution

Q9.If a function f:[2,∞)→B defined by f(x)=x2-4 x+5 is a bijection, then B=
•  R
•  [1,∞)
•   [4,∞)
•  [5,∞)
Solution

Q10. The domain of definition of the function f(x)=7-x Px-3, is
•  [3,7]
•  {3,4,5,6,7}
•  {3,4,5}
•  None of these
Solution

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