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domain ofe indéfini cos(7x)

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

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sequence type a_n+1=−3a_n, a₁=8

Solution

séquence géométrique: r=−3, a_n=8(−3)ⁿ⁻¹

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Solution steps

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2tk−3 =8k−2t

Multiplier en croix

2t(k−2t)=(k−3)· 8

Résoudre 2t(k−2t)=(k−3)· 8: t=−−k+√k²+32(−k+3)4 , t=k+√k²+32(−k+3)4

t=−−k+√k²+32(−k+3)4 , t=k+√k²+32(−k+3)4 ; k≠ 3

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first term a_n+1=−3a_n, a₁=8

nth term a_n+1=−3a_n, a₁=8

next term a_n+1=−3a_n, a₁=8

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

domain ofe indéfini cos(7x)

Solution

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