The process of 4-5 elective courses in senior high school mathematics - Training Enrollment Network

The process of 4-5 elective courses in senior high school mathematics

( 1)|x-a|≦3 a-3≦x≦a+3？ a=2

(2) Because f(x)=|x-2|? So | x-2 |+| x+3 |⊙m holds for all real numbers, because when x≦-3, |x-2|+|x+3|=- 1-2x.

When -3

The solution is as above

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