42/y=7

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Solution for 42/y=7 equation: 


D( y )

y = 0

y = 0

y = 0

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

42/y = 7 // - 7

42/y-7 = 0

42*y^-1 = 7 // : 42

y^-1 = 1/6

-1 < 0

1/(y^1) = 1/6 // * y^1

1 = 1/6*y^1 // : 1/6

6 = y^1

y = 6

y = 6

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