I = FF (x ^ 2 + y ^ 2) ds, where the surface is spherical x ^ 2 + y ^ 2 + Z ^ 2 = 2 (x + y + Z)

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1. Find the curve integral ∫ L (x + y) ds, l is the straight line segment connecting (1.0) (0.1) two points. (PS: explain how DS is transformed into DX)
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