Hii,

I am providing you with this link you can check for the answer here.

https://books.google.co.in/books?id=YQvPQcreqWcC&pg=RA1-PA181&lpg=RA1-PA181&dq=find+the+inflexion+point+on+the+curve+xy%3Da%5E2+log+(y/a)&source=bl&ots=-jk-d0n3ld&sig=ACfU3U2g7jpV7Rt44JZa9QDEM3SkQci2AQ&hl=en&sa=X&ved=2ahUKEwi7xLnm6sTmAhXjmeYKHdG1A0QQ6AEwE3oECA0QAg#v=onepage&q=find%20the%20inflexion%20point%20on%20the%20curve%20xy%3Da%5E2%20log%20(y%2Fa)&f=false