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domain of y=(x^2+x+1)/x

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(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

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domain y=x²+x+1x

Solution

x<0 or x>0

Interval Notation

(−∞ , 0)∪(0, ∞ )

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Domain definition

The domain of a function is the set of input or argument values for which the function is real and defined

Find undefined (singularity) points: x=0

The function domain

x<0 or x>0

Solve instead

range x²+x+1x

inverse x²+x+1x

intercepts x²+x+1x

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

domain of y=(x^2+x+1)/x

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