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Item bank of the first volume of mathematics in the second day of junior high school
Um ... How many repeated questions did the landlord ask?

1) Find the functional relationship between y and x, and find the range of independent variables.

Solution: 2*6= 12

Y = 120 \ x (x > 0) Note that the technical transformation does not mean an increase in hourly consumption.

Range of independent variable x (x > 0)

2) It takes more than 24 hours for some new raw materials to enter the factory. What is the control range of X in order to keep the machine running?

Solution: y≥24

∴ 120\x≥24

The solution is x≤5.

So 0 < x ≤ 5

This question is from the evaluation manual, right? I understand everything, believe me ~