KCET 19 Permutations and Combinations 3 If 2 x 2 y = 2 x y, then d y d x is KCET 4 Let P = a i j be a 3 × 3 matrix and let Q = b i j where b i j = 2 i j a i j for 1 ≤ i, j ≤ If the determinant of P is 2, then the determinant of the matrix Q is IIT JEE 12 Determinants 5If y = xxx∞ , then x (dy/dx) is equal to (A) (y2/ 1 y log x) (B) (y2/x( 1 y log x)) (x( 1 y log x)/y2) (D) none of these CheckIf y = x^x^x^ ∞, then dy / dx =
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