Question: Calculus: Find y' and y'' where y = ln(3x) / x^3 Don't know what I'm doing wrong. I keep getting for y' =(1-3ln3x)/x^4 and for

Calculus: Find y' and y'' where y = ln(3x) / x^3

Don't know what I'm doing wrong. I keep getting for y' =(1-3ln3x)/x^4 and for y"= (7-12ln3x)/x^5 , but that's wrong. HELP

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