7=y^(-1/2)

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Solution for 7=y^(-1/2) equation: 


D( y )

y = 0

y < 0

y = 0

y = 0

y < 0

y in (0:+oo)

7 = y^(-1/2) // - y^(-1/2)

7-y^(-1/2) = 0

-1*y^(-1/2) = -7 // : -1

y^(-1/2) = 7

-1/2 < 0

1/(y^(1/2)) = 7 // * y^(1/2)

1 = 7*y^(1/2) // : 7

1/7 = y^(1/2)

y^(1/2) = 1/7 // ^ 2

y = 1/49

y = 1/49

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