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

Expert Teacher provides CBSE Answers for MCQ 12 Science Maths Matrices 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 Matrices 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:**

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

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

**Question 1** : Given, , find the value of z. (View Answer Video)

**Question 2** : Find the value of Y, if and . (View Answer Video)

**Question 3** : Using elementary transformation, find the inverse of the matrix . (View Answer Video)

**Question 4** : Let Find A - B. (View Answer Video)

**Question 5** : Compute: . (View Answer Video)

**Question 1** : Given . Write f(x) satisfying the above. (View Answer Video)

**Question 2** : Evaluate : (View Answer Video)

**Question 3** : Evaluate: (View Answer Video)

**Question 4** : Evaluate : (View Answer Video)

**Question 5** : Evaluate : (View Answer Video)

**Question 1** : The function f is a differentiable function and satisfies the functional equation f(x) + f(y) = f(x + y) – xy – 1for every pair x, y of real numbers. If f(1) = 1, then the number of integers n ≠ 1 for which f(n) = n is_______________. (View Answer Video)

**Question 2** : A cylindrical tank of radius 10 m is being filled with wheat at the rate of 314 cubic meters per hour. Then the depth of the wheat is increasing at the rate of: (View Answer Video)

**Question 3** : The length x of a rectangle is decreasing at the rate of 5cm/minute. and width y is increasing at the rate of 4cm/minute. When x=8cm and y=6 cm, find the rate of changes of:

(a) the area of the rectangle. (View Answer Video)

**Question 4** : The total cost C(x) (in Rs) associated with the production of 'x' units of an item is given by :

C (x)=0.005x^{3}-0.02x^{2}+30x+5000.

Find the marginal cost when 3 units are produced, where by marginal cost we mean the instantaneous rate of change of total cost at any level of output. (View Answer Video)

**Question 5** : The slope of the normal to the curve at x = 0 is :

(View Answer Video)

**Question 1** : Find the particular solution of the differential equation given that y = 1, when x = 0. (View Answer Video)

**Question 2** : Find the solution of the differential equation (View Answer Video)

**Question 3** : Solve the differential equation (View Answer Video)

**Question 4** : If m and n are the order and degree, respectively of the differential equation then write value of m+n. (View Answer Video)

**Question 5** : If y(x) is a solution of the differential equation and y(0) = 1, then find the value of (View Answer Video)