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Verified Answer :

y=u²                    (du/dx[u^n]=n(u^(n-1))u`)
dy/du=2u(u´)=2u

u=4x+7
du/dx=4

dy/dx=(dy/du)(du/dx)=2u(4)=2(4x+7)(4)=8(4x+7)

Answer:
dy/du=2u
du/dx=4
dy/dx=8(4x+7)

syed514

dy/dx =2u
du/dx==4
 
and
dy/dx= (dy/du)(du/dx)
         =2u(4)
         = 8u
  

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