clues for qn 4,5 mdm lo part 2..

here it is...qns4,5,
4a)dy/dx=-3/(x-1)^2

b)X is not equal to 1,(x-1)^2>0,therefore,dy/dx<0.no stationery points.

5a)agian using the quotient rule,u should be able to get the answer,dy/dx=-2(x-1)(x-4)/(x^2-4)^2.

5b)dy/dx=0,x=1 or x=4.