average {1, 7,-3, 4, 9}

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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

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ddx

≥	≤	·	÷	`x`^◦	(☐)	\|☐\|	(`f` ◦ `g`)	`f`(`x`)	ln	`e`^☐
(☐)^′	∂∂`x`	∫_□^□	lim	∑	sin	cos	tan	cot	csc	sec

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đỉnh (y−3)²=8(x−5)

Solution

(h, k)=(5, 3), p=2

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(y−3)²=8(x−5)

Phương trình chuẩn parabol

4p(x−h)=(y−k)² là phương trình tiêu chuẩn cho một parabol hướng sang phải-trái với đỉnh tại (h, k),
và độ dài tiêu cự |p|

Viết lại (y−3)²=8(x−5) ở dạng chuẩn: 4· 2(x−5)=(y−3)²

Do đó các thuộc tính của parabol là:

(h, k)=(5, 3), p=2

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

average {1, 7,-3, 4, 9}

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