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Types of mathematical modeling
1. Buy more at a favorable price.

Let's set the initial pricing x.

For customers who buy more 1 kg, 10% discount, 2% discount for 2 kg, and the upper limit is ka%.

Find out the relationship between profit and f(x) and X by collecting data.

2. Buy fruits and send different fruits.

If the initial price is X, you will get another kind of fruit for every catty you buy, which is worth B yuan.

Find out the relationship between profit g(x) and X by collecting data.

Then compare the maximum values of f(x) and g(x).