3.1 | x : x = A + Bt + Ct3, A = 2 ; B = 1 /; C = -0.5 /3. x, t = 2 c. |
3.2 | 10 . an = 4.9 /2, = 60. . |
3.3 | 500 , , 1 40 / 28 /. . |
3.4 | 0.2 100 . , 5 . , , 100 /2. |
3.5 | , 500 /, . , 0.2 , 200 /. . |
3.6 | 5 200 . 5 ? |
3.7 | , , , : . 3 . |
3.8 | : , a = 5 . . |