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20-(8+7)+5

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

☐²

x^☐

√☐

^□√☐

□□

log_□

θ

∞

∫

ddx

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

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laplace ngược x+3x−1

Solution

δ(t)+4e^t

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Solution steps

One step at a time

L⁻¹{x+3x−1 }

Lấy một phần của x+3x−1 : 1+4x−1

=L⁻¹{1+4x−1 }

Sử dụng thuộc tính tuyến tính của Biến đổi Nghịch đảo Laplace:
Đối với các hàm f(s), g(s) và các hằng số a, b: L⁻¹{a·f(s)+b·g(s)}=a·L⁻¹{f(s)}+b·L⁻¹{g(s)}

=L⁻¹{1}+L⁻¹{4x−1 }

L⁻¹{1}: δ(t)

L⁻¹{4x−1 }: 4e^t

=δ(t)+4e^t

Order of operations three/four steps with parentheses Examples

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

20-(8+7)+5

Solution

Solution steps

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