Il Maraschini-Palma - volume 3

4 6x 2 + 7x + 2 > 0 119 {4x 2 3x + 15 0 120 x2 27 0 {__ 3 121 124 [x 9 o x 9] 2 x 7x 4x + 1 + 2(1 x) {3(x + 2) 2 12 > 3 (x + 2)(x 3) + (2x 1)(2x + 1) 126 2x(x + 1) 3 2(x 2)(x + 2) {( x 4) 2 + 3(x 2) 2 > (2x 1) 2 + 4(x + 1) 128 _x_ + 1 (2 2 5x _5_ ___ ) 4> 8 [x > 4] {4x 7 > 3(x 1) ______ 8 3x 25 17 x + 2x ______ + ___ 2 3 3 123 2 2 2(x + 1) _7_ 3x 1 ________ _______ + 2 3 3 125 127 ESERCIZI Equazioni, disequazioni, sistemi (2x 3) 3 8(x 2 3)(x 2) _______ 3 2 6 129 3 2 (2x 1) x(4x 3) 1 (2x 1)2 ________ _________ > __ ________ 3 6 3 2 [ ] (x + 2) 3 > x(x + 3) 2 (3x + 6) 2 > 9(x 2 + 4) 130 _3_x(x + 1) _1_x(x + 2) > ________ 5(x 1) 4 2 3 [x > 0] 12 ______ 1 3x 4 x2 1 1 + x2 + 1 ______ x __ + ______ 5 5 3 15 131 1 7 4 x x 2x(3x + 1) x 1 x + + 2 __ __ 2 ______ __ _________ [4 2 1 2 3 3 x 2 + x > 1 133 __ x 2 + x + __ > 0 __ _1_ [x 2 ( 5 1)] 235

Il Maraschini-Palma - volume 3
Il Maraschini-Palma - volume 3