3=4*(x/10)^0.8

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Solution for 3=4*(x/10)^0.8 equation: 


D( x )

x/10 < 0

x/10 < 0

x/10 < 0

1/10*x+0 < 0 // - 0

1/10*x < 0 // : 1/10

x < 0/1/10

x < 0

x in <0:+oo)

3 = 4*(x/10)^0.8 // - 4*(x/10)^0.8

3-(4*(x/10)^0.8) = 0

3-4*(x/10)^0.8 = 0

-4*(1/10)^0.8*x^0.8 = -3 // : -4*(1/10)^0.8

x^0.8 = -3/(-4*(1/10)^0.8)

( -3/(-4*(1/10)^0.8) < 0 i 0.8 in (0:1) ) => x należy do O

x belongs to the empty set

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