8(45X^(-1/4))=72

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Solution for 8(45X^(-1/4))=72 equation: 


D( X )

X = 0

X < 0

X = 0

X = 0

X < 0

X in (0:+oo)

8*45*X^(-1/4) = 72 // - 72

8*45*X^(-1/4)-72 = 0

360*X^(-1/4) = 72 // : 360

X^(-1/4) = 1/5

-1/4 < 0

1/(X^(1/4)) = 1/5 // * X^(1/4)

1 = 1/5*X^(1/4) // : 1/5

5 = X^(1/4)

X^(1/4) = 5 // ^ 4

X = 625

X = 625

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