Board Paper of Class 12Commerce 2017 Maths Delhi(SET 1)  Solutions
General Instructions:
(i) All questions are compulsory.
(ii) This question paper contains 29 questions.
(iii) Questions 1 4 in Section A are very shortanswer type questions carrying 1 mark each.
(iv) Questions 512 in Section B are shortanswer type questions carrying 2 marks each.
(v) Questions 1323 in Section C are longanswer I type questions carrying 4 marks each.
(vi) Questions 2429 in Section D are longanswer II type questions carrying 6 marks each.
(i) All questions are compulsory.
(ii) This question paper contains 29 questions.
(iii) Questions 1 4 in Section A are very shortanswer type questions carrying 1 mark each.
(iv) Questions 512 in Section B are shortanswer type questions carrying 2 marks each.
(v) Questions 1323 in Section C are longanswer I type questions carrying 4 marks each.
(vi) Questions 2429 in Section D are longanswer II type questions carrying 6 marks each.
 Question 1
If A is a 3 × 3 invertible matrix, then what will be the value of k if det(A^{–1}) = (det A)^{k}. VIEW SOLUTION
 Question 2
Determine the value of the constant 'k' so that function $\mathrm{f}\left(x\right)=\left\{\begin{array}{ll}\frac{kx}{\leftx\right},& \mathrm{if}x0\\ 3,& \mathrm{if}x\ge 0\end{array}\right.$ is continuous at x = 0. VIEW SOLUTION
 Question 3
Evaluate : $\underset{2}{\overset{3}{\int}}{3}^{x}dx.$ VIEW SOLUTION
 Question 4
If a line makes angles 90° and 60° respectively with the positive directions of x and y axes, find the angle which it makes with the positive direction of zaxis. VIEW SOLUTION
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