## MATHEMATICS FUNCTION QUIZ-9

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:A→B be a function defined by f(x)=√3 sin⁡x+cos⁡x+4. If f is invertible, then
•  A=[-2Ï€/3,Ï€/3],B=[2,6]
•  A=[Ï€/6,5Ï€/6],B=[-2,2]
•  A=[-Ï€/2,Ï€/2],B=[2,6]
•  A=[-Ï€/3,Ï€/3],B=[2,6]
Solution

Q2.

•  (-∞,-1/3)
•  (-1/3,∞)
•  (1/3,∞)
•  [1/3,∞)
Solution

Q3.  Which of the following functions is not an are not an injective map(s)?
•  f(x)=|x+1|,x∈[-1,∞)
•  g(x)=x+
1/x
,x∈(0,∞)
•  h(x)=x2+4x-5,x∈(0,∞)
•  h(x)=e-x,x∈[0,∞)
Solution

Q4.

•

•

•

•

Solution

Q5.The domain of the function f(x)=log2(log3(log4⁡x ))is
•  (-∞,4)
•  (4,∞)
•  (0,4)
•  (1,∞)
Solution

Q6.

•  a
•  2a
•  b
•  2b
Solution

Q7.

• 4
•  6
•  12
•  24
Solution

Q8.If f∶N→N is defined by f(n)= the sum of positive divisors of n, then f(2k×3), where k is a positive integer, is
•  2k+1-1
•  2(2k+1-1)
•  3(2k+1-1)
•  4(2k+1-1)
Solution

Q9.If f(x) satisfies the relation 2f(x)+f(1-x)=x2 for all real x, then f(x) is
•

•

•

•

Solution

Q10.

•  (0,1)∪(0,∞)
•  (-1,0)∪(1,∞)
•  (-∞,-1)∪(0,∞)
•  (-∞,0)∪[1,∞)
Solution

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