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Determine whether or not 
F is a conservative vector field. If it is, find a function 
f such that 
F=grad f. (If the vector field is not conservative, enter DNE.)

F(x,y)=◻)=(ye^(x)+sin(y))i+(e^(x)+x cos(y))j

Determine whether or not F \mathbf{F} is a conservative vector field. If it is, find a function f f such that F=\(\newlineabla f \). (If the vector field is not conservative, enter DNE.)\newlineF(x,y)=)=(yex+sin(y))i+(ex+xcos(y))j F(x, y)=\square)=\left(y e^{x}+\sin (y)\right) \mathbf{i}+\left(e^{x}+x \cos (y)\right) \mathbf{j}

Full solution

Q. Determine whether or not F \mathbf{F} is a conservative vector field. If it is, find a function f f such that F=\(\newlineabla f \). (If the vector field is not conservative, enter DNE.)\newlineF(x,y)=)=(yex+sin(y))i+(ex+xcos(y))j F(x, y)=\square)=\left(y e^{x}+\sin (y)\right) \mathbf{i}+\left(e^{x}+x \cos (y)\right) \mathbf{j}
  1. Identify Components of Vector Field: Step 11: Identify the components of the vector field FF.F(x,y)=(yex+sin(y))i+(ex+xcos(y))jF(x, y) = (y e^x + \sin(y))\mathbf{i} + (e^x + x \cos(y))\mathbf{j}
  2. Check for Conservativity: Step 22: Check if the vector field FF is conservative by comparing the partial derivatives.\newlineFor FF to be conservative, Py\frac{\partial P}{\partial y} must equal Qx\frac{\partial Q}{\partial x}, where P=yex+sin(y)P = y e^x + \sin(y) and Q=ex+xcos(y)Q = e^x + x \cos(y).\newlinePy=ex+cos(y)\frac{\partial P}{\partial y} = e^x + \cos(y)\newlineQx=exxsin(y)\frac{\partial Q}{\partial x} = e^x - x \sin(y)
  3. Compare Partial Derivatives: Step 33: Compare the results from Step 22.\newlineSince P/y=ex+cos(y)\partial P/\partial y = e^x + \cos(y) and Q/x=exxsin(y)\partial Q/\partial x = e^x - x \sin(y), they are not equal because of the xsin(y)x \sin(y) term in Q/x\partial Q/\partial x.

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