7=49/z

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Solution for 7=49/z equation: 


D( z )

z = 0

z = 0

z = 0

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

7 = 49/z // - 49/z

7-(49/z) = 0

7-49*z^-1 = 0

-49*z^-1 = -7 // : -49

z^-1 = 1/7

-1 < 0

1/(z^1) = 1/7 // * z^1

1 = 1/7*z^1 // : 1/7

7 = z^1

z = 7

z = 7

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