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  # C3 help needed please watch
  
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  1. Need help with Q14 A
  
  Using product rule I got dy/dx= 3(x+1)^2(2x-1)^4 + 8(2x-1)^3(x+1)^3
  
  Need help from here
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  2. (Original post by Vorsah)
  Need help with Q14 A
  
  Using product rule I got dy/dx= 3(x+1)^2(2x-1)^4 + 8(2x-1)^3(x+1)^3
  
  Need help from here
  dy/dx = v[du/dx] - u[dv/dx]
  =[(2x-1)^4][3(x+1)^2][1] - [(x+1)^3][4(2x-1)^3][2]
  =3[(x+1)^2][(2x-1)^4] - 8[(x+1)^3][(2x-1)^3]
  
  Try factorising as (x+1)^2 is a common factor as well as (2x-1)^3
  3. (Original post by krisshP)
  dy/dx = v[du/dx] - u[dv/dx]
  =[(2x-1)^4][3(x+1)^2][1] - [(x+1)^3][4(2x-1)^3][2]
  =3[(x+1)^2][(2x-1)^4] - 8[(x+1)^3][(2x-1)^3]
  
  Try factorising as (x+1)^2 is a common factor as well as (2x-1)^3
  Thanks
  4. (Original post by Vorsah)
  Thanks
  You should get this
  
  Then you can just expand out the stuff in [......] and simplify
  
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