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JEE PYQ Solutions Are SECRETLY Helping Students
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JEE Previous Year Question Paper Solution Part 3 • 00:00 Introduction • 00:20 Example 1 • 07:37 Example 2 • 14:27 Example 3 • 20:00 Example 4 • Example 1: Let A = [a_g ]_2x2 where a_g ≠0 for all i,j and A^2=I. Let a be the sum of all diagonal elements of A and b = |A|, then 3a^2+4b^2 is equal to • 7 (b) 14 (c) 3 (d) 4 • Example 2: Let P be a square matrix such that P^2=1-I . For α,β,γ,δ ϵ N,if P^α+P^β= γI-29P and P^α-P^β= δI-13P,then α+ β+ γ- δ is equal to • (a) 18 (b) 40 (c) 24 (d) 22 • Example 3: If P is a 3x3 real matrix such that P^T=aP+(a-1)I, where a greater than 1, then • (a) P is a Singular matrix (b) |Adj P| greater than 1 (c) |Adj P| = ½ (d) |Adj P| = 1 • Example 4: The number of symmetric matrices of order 3, with all the entries from the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} is • (a) 6^10 (b) 9^10 (c) 10^9 (d) 10^6 • #jee #12thclass #matrixjee #matricesclass12 #matrices #matrix #determinants #symmetricmatrix #adjointofmatrix
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