5-2/(2k-1)=7

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Solution for 5-2/(2k-1)=7 equation: 


D( k )

2*k-1 = 0

2*k-1 = 0

2*k-1 = 0

2*k-1 = 0 // + 1

2*k = 1 // : 2

k = 1/2

k in (-oo:1/2) U (1/2:+oo)

5-(2/(2*k-1)) = 7 // - 7

5-(2/(2*k-1))-7 = 0

5-2*(2*k-1)^-1-7 = 0

5-2/(2*k-1)-7 = 0

(-7*(2*k-1))/(2*k-1)-2/(2*k-1)+(5*(2*k-1))/(2*k-1) = 0

5*(2*k-1)-7*(2*k-1)-2 = 0

10*k-14*k-5+5 = 0

-4*k = 0

(-4*k)/(2*k-1) = 0

(-4*k)/(2*k-1) = 0 // * 2*k-1

-4*k = 0

-4*k = 0 // : -4

k = 0

k = 0

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