gianna2000 gianna2000
  • 09-09-2018
  • Mathematics
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How do I find the domain of f(x)=5x^2+4. When 0<=x<=2

#54

How do I find the domain of fx5x24 When 0ltxlt2 54 class=

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khaoula9505p8hixk
khaoula9505p8hixk khaoula9505p8hixk
  • 09-09-2018

Hi

if 0 ≤ x ≤ 2

[tex]0^2\leq x^2\leq 2^2[/tex]

Multiplied by 5..... [tex]5×0^2 \leq 5x^2\leq 5×2^2[/tex]

add 4  .........[tex]5×0^2+4 \leq 5x^2+4\leq 5×2^2[/tex]+4

so ........[tex]4\leq 5x^2+4\leq 24[/tex]



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