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Question Number 18327 by mondodotto@gmail.com last updated on 18/Jul/17

Commented by mondodotto@gmail.com last updated on 18/Jul/17

$$\mathrm{please}\mathrm{help}!!$$

Answered by ajfour last updated on 19/Jul/17

$$\mathrm{if}\mathrm{x}+1>0\Rightarrow \mathrm{x}>-1$$$$3-\mathrm{x}⩽\mathrm{x}+1$$$$2\mathrm{x}⩾2$$$$\mathrm{x}⩾1$$$$\mathrm{if}\mathrm{x}+1<0\Rightarrow \mathrm{x}<-1$$$$3-\mathrm{x}⩾\mathrm{x}+1$$$$2\mathrm{x}⩽2$$$$\mathrm{x}⩽1\mathrm{so}\mathrm{x}<-1$$$$\mathrm{combining}\mathrm{the}\mathrm{result}\mathrm{of}\mathrm{the}\mathrm{two}$$$$\mathrm{cases}:\mathrm{x}\in (-\mathrm{\infty },-1)\cup [1,\mathrm{\infty })$$

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