2/(x+5)-4/(x+5)= 3/(2x-1)

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

☐²

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√☐

^□√☐

□□

log_□

θ

∞

∫

ddx

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

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góc (

a

), (

b

)

Solution

arccos(ab√a²√b²+1 )

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(

a

), (

b

)

Tính góc giữa các vecto: cos(θ) =⃗ a · ⃗ b |⃗ a |· |⃗ b |

⃗ a =(

a

), ⃗ b =(

b

)

Tính ⃗ a · ⃗ b |⃗ a |· |⃗ b | : ab√a²√b²+1

cos(θ)=ab√a²√b²+1

=arccos(ab√a²√b²+1 )

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

2/(x+5)-4/(x+5)= 3/(2x-1)

Solution

Solution steps

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