8/2=5/k

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Solution for 8/2=5/k equation: 


D( k )

k = 0

k = 0

k = 0

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

8/2 = 5/k // - 5/k

8/2-(5/k) = 0

8/2-5*k^-1 = 0

-5*k^-1 = -4 // : -5

k^-1 = 4/5

-1 < 0

1/(k^1) = 4/5 // * k^1

1 = 4/5*k^1 // : 4/5

5/4 = k^1

k = 5/4

k = 5/4

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