Menu Close

f-x-x-2-if-x-gt-3-3-if-x-3-x-4-if-1-x-lt-3-1-if-1-lt-x-faind-lim-x-1-f-x-and-lim-x-3-f-x-




Question Number 184239 by mathlove last updated on 04/Jan/23
f(x)= { ((x−2       if  x>3)),((3               if  x=3)),((−x+4    if  1≤x<3)),((1                if  1<x)) :}  faind    lim_(x→1) f(x)=?  and lim_(x→3) f(x)=?
$${f}\left({x}\right)=\begin{cases}{{x}−\mathrm{2}\:\:\:\:\:\:\:{if}\:\:{x}>\mathrm{3}}\\{\mathrm{3}\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:{if}\:\:{x}=\mathrm{3}}\\{−{x}+\mathrm{4}\:\:\:\:{if}\:\:\mathrm{1}\leqslant{x}<\mathrm{3}}\\{\mathrm{1}\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:{if}\:\:\mathrm{1}<{x}}\end{cases} \\ $$$${faind}\:\:\:\:\underset{{x}\rightarrow\mathrm{1}} {\mathrm{lim}}{f}\left({x}\right)=?\:\:{and}\:\underset{{x}\rightarrow\mathrm{3}} {\mathrm{lim}}{f}\left({x}\right)=? \\ $$
Answered by SEKRET last updated on 04/Jan/23
 lim_(x→1^− ) f(x) = 1        lim_(x→1^+ ) f(x)=3  lim_(x→3^− )  f(x) = 1     lim_(x→3^+ ) f(x)=1   lim_(x→3) f(x) = 3
$$\:\boldsymbol{\mathrm{lim}}_{\boldsymbol{\mathrm{x}}\rightarrow\mathrm{1}^{−} } \boldsymbol{\mathrm{f}}\left(\boldsymbol{\mathrm{x}}\right)\:=\:\mathrm{1}\:\:\:\:\:\:\:\:\boldsymbol{\mathrm{lim}}_{\boldsymbol{\mathrm{x}}\rightarrow\mathrm{1}^{+} } \boldsymbol{\mathrm{f}}\left(\boldsymbol{\mathrm{x}}\right)=\mathrm{3} \\ $$$$\boldsymbol{\mathrm{lim}}_{\boldsymbol{\mathrm{x}}\rightarrow\mathrm{3}^{−} } \:\boldsymbol{\mathrm{f}}\left(\boldsymbol{\mathrm{x}}\right)\:=\:\mathrm{1}\:\:\:\:\:\boldsymbol{\mathrm{lim}}_{\boldsymbol{\mathrm{x}}\rightarrow\mathrm{3}^{+} } \boldsymbol{\mathrm{f}}\left(\boldsymbol{\mathrm{x}}\right)=\mathrm{1} \\ $$$$\:\boldsymbol{\mathrm{lim}}_{\boldsymbol{\mathrm{x}}\rightarrow\mathrm{3}} \boldsymbol{\mathrm{f}}\left(\boldsymbol{\mathrm{x}}\right)\:=\:\mathrm{3} \\ $$

Leave a Reply

Your email address will not be published. Required fields are marked *