amaya427 amaya427
  • 22-11-2018
  • Mathematics
contestada

find the domain of the ration function
R(x)=7-2x/x^3-8x^2+7x

Respuesta :

gmany
gmany gmany
  • 25-11-2018

[tex]R(x)=\dfrac{7-2x}{x^3-8x^2+7x}\\\\The\ domain:\\\\x^3-8x^2+7x\neq0\\\\x(x^2-8x+7)\neq0\\\\x(x^2-x-7x+7)\neq0\\\\x[x(x-1)-7(x-1)]\neq0\\\\x(x-1)(x-7)\neq0\iff x\neq0\ \wedge\ x-1\neq0\ \wedge\ x-7\neq0\\\\\boxed{x\neq0\ \wedge\ x\neq1\ \wedge\ x\neq7}\to\boxed{x\in\mathbb{R}-\{0,\ 1,\ 7\}}[/tex]

Answer Link

Otras preguntas

What is a compound word of a foot that is bare. Join two words from the riddle to make a compound word
1/4 of a liter is equal to how many mL
Compare and contrast ancient China and ancient Japan.  please help! i need to do an essay on it that is 3-5 paragraphs long.
Why is technology a challenge to skills management ?How can businesses selling the same goods/services eliminate competition ?
By which name was William the Conqueror known in his native land?
What might happen to the sea star population after oyster beds are destroyed
1/4 of a liter is equal to how many mL
2v2 -5v +3 = 0 how did I do this?
Write 115.9% as a fraction
Volume , mass, and weight can be measured with balances, scales, and ?