√45
6,8=√46,24
3√6=√54
√45 ; 6,8 ; 3√6
6 5/6 , 4 2/3 и 1 1/7 переведем в неправильные дроби
6 5/6 = 41/6
4 2/3 = 14/3
1 1/7 = 8/7
1. 4/5 + 19 = 19 4/5 = 99/5
2. 41/6 + 14/3 = 41/6 + 28/6 = 69/6 = 23/3
3. 8/7 * 99/5 = 792/35
4. 792/35 * 23/3 = 18216/105 = 672/35 = 96/5 = 19,2
F '(x) = 5*4x^3 = 20x^3
f ' ( - 0,2) = 20*( - 0,2)^3 = - 0,16