Current location - Training Enrollment Network - Mathematics courses - 20 12 The last question in the final exam of Jiaxing Mathematics next semester. . . How come? I'll ask grandpa Baidu as soon as I finish the paper. He is omnipotent. . . . )
20 12 The last question in the final exam of Jiaxing Mathematics next semester. . . How come? I'll ask grandpa Baidu as soon as I finish the paper. He is omnipotent. . . . )
It takes 5 days for A and 8 days for B to complete the relay.
It takes x days for A, 13-x days for B, y days for A and y+9 days for B. The speed of A is 1800/y, and the speed of B is 1800/(9+y) and1800x.
Get the square of (y-2) =9x+4, and X can be substituted at will. Where the integer solution is x=5 and y=9.