2w=40/w

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Solution for 2w=40/w equation:


D( w )

w = 0

w = 0

w = 0

w in (-oo:0) U (0:+oo)

2*w = 40/w // - 40/w

2*w-(40/w) = 0

2*w-40*w^-1 = 0

2*w^1-40*w^-1 = 0

(2*w^2-40*w^0)/(w^1) = 0 // * w^2

w^1*(2*w^2-40*w^0) = 0

w^1

2*w^2-40 = 0

2*w^2-40 = 0

DELTA = 0^2-(-40*2*4)

DELTA = 320

DELTA > 0

w = (320^(1/2)+0)/(2*2) or w = (0-320^(1/2))/(2*2)

w = 2*5^(1/2) or w = -2*5^(1/2)

w in { -2*5^(1/2), 2*5^(1/2)}

w in { -2*5^(1/2), 2*5^(1/2) }

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