Application of two inequalities in the first grade of junior high school 1. It takes 10 hours for a ship to travel from a place in the upper reaches of a river to B place in the lower reaches at a constant speed, and less than 12 hours to return from B place to a place at a constant speed. The water velocity of this section of the river is 3km / h, and the still water velocity V of the ship to and fro remains unchanged. What conditions does V meet? 2. Lao Zhang and Lao Li bought the same number of breeding rabbits. One year later, the number of breeding rabbits raised by Lao Zhang increased by 2 compared with the number of breeding rabbits bought by Lao Li. Lao Li raised one less than twice the number of breeding rabbits bought by Lao Zhang, and the number of breeding rabbits raised by Lao Zhang did not exceed 2 / 3 of Lao Li's. how many breeding rabbits did Lao Zhang buy at least a year ago?

Application of two inequalities in the first grade of junior high school 1. It takes 10 hours for a ship to travel from a place in the upper reaches of a river to B place in the lower reaches at a constant speed, and less than 12 hours to return from B place to a place at a constant speed. The water velocity of this section of the river is 3km / h, and the still water velocity V of the ship to and fro remains unchanged. What conditions does V meet? 2. Lao Zhang and Lao Li bought the same number of breeding rabbits. One year later, the number of breeding rabbits raised by Lao Zhang increased by 2 compared with the number of breeding rabbits bought by Lao Li. Lao Li raised one less than twice the number of breeding rabbits bought by Lao Zhang, and the number of breeding rabbits raised by Lao Zhang did not exceed 2 / 3 of Lao Li's. how many breeding rabbits did Lao Zhang buy at least a year ago?

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