Recent content by 3pear

  1. 3

    Chain Rule Application: Solving a First Year Uni Math Problem

    oh!i got it~~~ thanks mates~
  2. 3

    Chain Rule Application: Solving a First Year Uni Math Problem

    ok,i got it,but i still not clear which varible i take respect to when i differenciate for u=x+y and v=x-y...
  3. 3

    Chain Rule Application: Solving a First Year Uni Math Problem

    yeah i know,but no idea homework do i apply on this question~~
  4. 3

    Chain Rule Application: Solving a First Year Uni Math Problem

    first year uni math problem~~ 　　if w=f(u,v)has continuous partial derivatives and u=x+y 　　and v=x-y,use the chain rule to show that 　　 　　(dw/dx)/(dw/dy)=(df/du)^2-(df/dv)^2 this is a first year uni math problem,is there anyone can help we with it?? thx a lot! :cry: