Commerce (English Medium) Class 12 - CBSE Question Bank Solutions

If A and B are symmetric matrices of the same order, then ____________.

If A and B are symmetric matrices of the same order, then ____________.

If A = `[(3, "x" - 1),(2"x" + 3, "x" + 2)]` is a symmetric matrix, then x = ____________.

If A is any square matrix, then which of the following is skew-symmetric?

If A `= [(6,8,5),(4,2,3),(9,7,1)]` is the sum of a symmetric matrix B and skew-symmetric matrix C, then B is ____________.

The diagonal elements of a skew symmetric matrix are ____________.

If A = [a_ij] is a skew-symmetric matrix of order n, then ______.

If `[(2, 0),(5, 4)]` = P + Q, where P is symmetric, and Q is a skew-symmetric matrix, then Q is equal to ______.

Number of symmetric matrices of order 3 × 3 with each entry 1 or – 1 is ______.

The value of |A|, if A = `[(0, 2x - 1, sqrt(x)),(1 - 2x, 0, 2sqrt(x)),(-sqrt(x), -2sqrt(x), 0)]`, where x ∈ R⁺, is ______.

Match the following:

Choose the correct option from the following:

Briefly explain the functions of Directing to organize sports event.

Briefly explain the functions of Controlling to organize sports event.

Assertion: Scurvy is caused due to the deficiency of Vitamin C.

Reason: The disease sets in when the diet does not include fresh vegetables and fruits for a long time.

Which one of the following statements is correct?

Make a table of test items listed under fitness test by SAI (Age group 9-18 yrs).

Which of the following factors does NOT determine flexibility?

Briefly explain any two factors determining endurance.

What is BMI?

Differentiate between Macro and Micro Nutrients.

Calculate BMI of a child whose weight is 72 kg and height 1.68 mt.