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xy+x-4y=11, xy-x-4y=4

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

☐²

x^☐

√☐

^□√☐

□□

log_□

θ

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∫

ddx

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

simplify solve for partial fractions long division line

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fourier transform sin(2t)

Solution

−iπ(δ(ω−2)−δ(ω+2))

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Solution steps

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F{sin(2t)}

Use Fourier Transform table: F{sin(αt)}=−iπ(δ(ω−α)−δ(ω+α))

F{sin(2t)}=−iπ(δ(ω−2)−δ(ω+2))

=−iπ(δ(ω−2)−δ(ω+2))

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

xy+x-4y=11, xy-x-4y=4

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