Find the intervals in which the function f(x)=(4x²+1)/x is ,1) increasing 2) decreasing
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y=(4x^2 +1)/x..... problem...NOT defined for x=0 . . . for x>0, y go up as x go rite . . . for x< 0, y is alwaes negativ ( 1 . . . hav problem as x get kloes tu zero from left side... it approach 1/ zoom down very steep

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