6/4.2=10/j

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Solution for 6/4.2=10/j equation: 


D( j )

j = 0

j = 0

j = 0

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

6/4.2 = 10/j // - 10/j

6/4.2-(10/j) = 0

6/4.2-10*j^-1 = 0

-10*j^-1 = -1.42857143 // : -10

j^-1 = 0.14285714

-1 < 0

1/(j^1) = 0.14285714 // * j^1

1 = 0.14285714*j^1 // : 0.14285714

7.00000014 = j^1

j = 7.00000014

j = 7.00000014

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