Conven +477an(4t) anto system of first-order equations: 90 [ri-z *--5 si(499] b) 0 [ri-Iz' *-413 si(4f)] 9 0 |ri"rz si(4f)] d) 0 cos 4t)] [r; cos 4t)] None ...
確定! 回上一頁