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y=x^2.arctan√(x-1)
dy
= 2x.arctan√(x-1) dx + x^2 .darctan√(x-1)
=2x.arctan√(x-1) dx + x^2 . [1/( 1+(x-1) ]. d√(x-1)
=2x.arctan√(x-1) dx + x^2 . (1/x). [1/(2√(x-1)) ] dx
=2x.arctan√(x-1) dx + (x/[(2√(x-1)) ]) dx
=(2x.arctan√(x-1) + x/[2√(x-1))] ) dx
dy
= 2x.arctan√(x-1) dx + x^2 .darctan√(x-1)
=2x.arctan√(x-1) dx + x^2 . [1/( 1+(x-1) ]. d√(x-1)
=2x.arctan√(x-1) dx + x^2 . (1/x). [1/(2√(x-1)) ] dx
=2x.arctan√(x-1) dx + (x/[(2√(x-1)) ]) dx
=(2x.arctan√(x-1) + x/[2√(x-1))] ) dx
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