af Given f(x, y) = In(7x² + 9y²) then

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A: I am attaching image so that you understand each and every step.

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A: I am attaching image so that you understand each and every step.

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A: Formula:Integration by parts:∫ uv dx =u∫v dx -∫ dudx∫vdxdxI=∫ x5 ln x dxu=ln x, dudx=1xv=x5I=ln x ∫…