8/5=4/k

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Solution for 8/5=4/k equation:


D( k )

k = 0

k = 0

k = 0

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

8/5 = 4/k // - 4/k

8/5-(4/k) = 0

8/5-4*k^-1 = 0

-4*k^-1 = -8/5 // : -4

k^-1 = 2/5

-1 < 0

1/(k^1) = 2/5 // * k^1

1 = 2/5*k^1 // : 2/5

5/2 = k^1

k = 5/2

k = 5/2

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