y=8ax^3+6/x
y has a minimum value when x=0.5
work out the value of a
Can you put that in TeX or at least add parenthesis? I can't tell if you mean \(y=\) \(8ax³+6\over x\), \(8ax³+6/x\) , \(8ax^{3+6/x}\) , or something else entirely.
y=(8ax^3)+(6/x)
+308 
