Interval subtraction problem mathematical solves the problem of subtracting intervals

Draw a coordinate axis.

The shared part is the answer, like this.

Among them, the solid represents closed, the hollow represents open, and the minus sign represents the complement.

Suppose A is in cell A1, B is in cell B1, C is in cell C1, D is in cell D1 (A1 B1) (C1 D1) If A1 is in the form A b and B1 is in the form C D, there are two methods: [First] Enter quot; ＝＆quot；＆amp；a1＆amp；＆quot；－（quot；＆amp；b1＆amp；＆quot；）＆quot；Then select the cell to copy, paste the value selectively in place, and then, double-click the cell, press Enter【Second Type】 1 Open the "Insert" menu, select the "Definition" subcommand in the "Name" command, and the "Define Name" dialog box appearss 2 Enter the name of the definition "gongshi" x in the "Name in current worksheet" input field, enter evaluate(a1) evaluate(b1)4062 in the "Reference Position" field below, and click Add 06 button to exit. 3 Enter "gongshi" in the cells you want to calculate

This is the same as the concept of the set remainder, (-1,3]-(2,20] means the new interval obtained by removing the number in the range (2,20) from the interval (-1,3).

Hope it helps. Happy learning! High School Math Study Group.

Don't listen to their nonsense, the max in the A set and the min in the B set are the maximum values, and the min in the A set and the max in the B set are the minimum values.

It is more convenient to draw a sketch to do this kind of problem, and the part that is removed from (2,20) in (-1,3) is the answer.

The subtraction interval is (- 1).

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Original = -(x+2)+6 Signal (x+2)-2 can make x+2=y

then the original formula =-y+6 y-2

I'm going to destroy Tan Mao right away.