3 years ago

(v 4 - v 3 - 68v 2 - 26v - 94) ÷ (v - 9)

Mathematics

1 answer:

max2010maxim [7]3 years ago

6 0

Maybe it’s -2(46+13) or -92-26v

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IceJOKER [234]

It has to be -912 because i checked on a caculator

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3 years ago

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krok68 [10]

1. 9
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3 years ago

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lubasha [3.4K]

Answer:

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3 years ago

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torisob [31]

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7 0

4 years ago

Solve sin^4(x)+cos^4(x)=cos4x

ICE Princess25 [194]

$\sin^4x=(\sin^2x)^2=\left(\dfrac{1-\cos2x}2\right)^2=\dfrac{1-2\cos2x+\cos^22x}4$
$\cos^4x=(\cos^2x)^2=\left(\dfrac{1+\cos2x}2\right)^2=\dfrac{1+2\cos2x+\cos^22x}4$

$\implies \sin^4x+\cos^4x=\dfrac{2+2\cos^22x}4=\dfrac{1+\cos^22x}2$

$\cos^22x=\dfrac{1+\cos4x}2$
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$4x=2k\pi\implies x=\dfrac{k\pi}2$

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4 years ago