Test 01

┬а2 mark

|┬а-0.25 mark |

┬а20 minutes

|┬а┬аWatch Video

Question 1:

If A = \begin{bmatrix} y & z & x \\ z & x & y \\ x & y & z \end{bmatrix}, where x, y, z are integers, is an orthogonal matrix, then what is the value of x^{2} + y^{2} + z^{2}?

Question 2:

If [x 1 1] [1 2 3; 4 5 6; 7 8 9] [1; 1; x] = [45], then which one of the following is a value of x?

Question 3:

If the sum of binomial coefficients in the expansion of \( (x+y)^{n} \) is 256, then the greatest binomial coefficient occurs in which one of the following terms?

Question 4:

How many 7-letter words (with or without meaning) can be constructed using all the letters of the word CAPITAL so that all consonants come together in each word?

Question 5:

In how many ways can the letters of the word DELHI be arranged keeping the positions of vowels and consonants unchanged?

Question 6:

If \( k<(\sqrt{2}+1)^{3}