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# CBSE XII Pre Boards 2015 : MATHEMATICS with Answers (KV Kolkata)

9 pages, 32 questions, 22 questions with responses, 59 total responses,    0    0
 Kendriya Vidyalaya No.1 Salt Lake Kendriya Vidyalaya (KV) No. 1, Salt Lake
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KENDRIYA VIDYALAYA SANGATHAN-KOLKATA REGION 3rd PRE-BOARD EXAMINATION: 2014-15 SUB: MATHEMATICS TIME ALLOWED: 3 HOURS M.M :100 General Instructions: 1. All questions are compulsory. 2. The question paper consists of 26 questions divided into three sections-A, B and C. Section A comprises of 6 questions of one mark each, Section B comprises of 13 questions of four marks each and Section C comprises of 7 questions of six marks each. 3. All questions in Section A are to be answered in one word, one sentence or as per the exact requirement of the question. 4. There is no overall choice. However, internal choice has been provided in 4 questions of four marks each and 2 questions of six mark each. You have to attempt only one of the alternatives in all such questions. 5. Use of calculators is not permitted. Section A Q1. Evaluate: tan 1 3 sec 1 ( 2) Q2 Find gof if f(x) =8 x3 , g(x)= Q3. If = . , find the value of y . Q4. Evaluate: Q5. Find p such that x y z y z x and are perpendicular to each other. 1 2 3p 2 4 1 Q6. If determinant of a square matrix of order 3 is 4,find the determinant of its adjoint. Section B Q7. Show that is commutative and associative. Find the identity element for on A, if any. Q8. Prove = , x OR Solve for x Q9. By using properties of determinants, show that: 1

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Additional Info : KV Sangathan, Kolkata Region MATHEMATICS Pre-Board Examination 2014-15 with Marking Scheme of Class XII PB-III MATHEMATICS Question Paper
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