Relations and Functions MCQ CBSE Maths 12 Science Answers in English to enable students to get Answers in a narrative video format for the specific question.

Expert Teacher provides Relations and Functions MCQ CBSE Maths 12 Science Answers through Video Answers in English language. This video solution will be useful for students to understand how to write an answer in exam in order to score more marks. This teacher uses a narrative style for a question from Relations and Functions not only to explain the proper method of answering question, but deriving right answer too.

Please find the question below and view the Answer in a narrative video format.

** Question:**

** A function is surjective if and only if , **

** Answer Video in** **English****:**

You can select video Answers from other languages also. Please check Answers in ( Hindi )

**Question 1** : If f and g two functions such that they are one-one then g o f is: (View Answer Video)

**Question 2** : Let * be any binary operation on the set R defined by a * b = a + b – ab, then the binary operation * is, (View Answer Video)

**Question 3** : Let * be the binary operation on N given by a * b = LCM of a and b. Find 20 * 16. (View Answer Video)

**Question 4** : * is a binary operation on Z such that: a * b = a + b + ab. The solution of (3* 4) *x = – 1 is,

(View Answer Video)

**Question 5** : Functions are defined respectively, by , find . (View Answer Video)

**Question 1** : The objective function is maximum or minimum, which lies on the boundary of the feasible region. (View Answer Video)

**Question 1** : Find the differential equation of the family of lines passing through the origin. (View Answer Video)

**Question 2** : Find the general solution of the following differential equation :

(View Answer Video)

**Question 3** : Solve the following differential equation :

(View Answer Video)

**Question 4** : Find the general solution of differential equation (View Answer Video)

**Question 5** : Obtain the differential equation of all the circles of radius r. (View Answer Video)

**Question 1** : Compute the magnitude of the following vectors:

(View Answer Video)

**Question 2** : Write a unit vector in the direction of the sum of vectors and (View Answer Video)

**Question 3** : Find the scalar quantities from the following:

(i) 10 kg (ii) 2 m north-west (iii)

(iv) 40 W (v) (vi) (View Answer Video)

**Question 4** : if a, b, c are unit vectors such that a + b + c = 0, then find the value of a.b + b.c + c.a. (View Answer Video)

**Question 5** : Find a vector of magnitude making an angle of with x-axis, with y-axis and an acute angle with z-axis. (View Answer Video)