[high number] find the curved area fraction FF ∑ DS / (x ^ 2 + y ^ 2 + Z2), where ∑ is the cylindrical surface between the plane z = 0 and z = 1, x ^ 2 + y ^ 2 = 1 Find the surface fraction FF ∑ DS / (x ^ 2 + y ^ 2 + Z2), where ∑ is the cylindrical surface between the plane z = 0 and z = 1, x ^ 2 + y ^ 2 = 1 PS: add a small question 4x + 2yin (x + radical (1 + x ^ 2)) to find the partial derivative of X. how can the answer be 4 + (2Y) / radical (1 + x ^ 2)?

[high number] find the curved area fraction FF ∑ DS / (x ^ 2 + y ^ 2 + Z2), where ∑ is the cylindrical surface between the plane z = 0 and z = 1, x ^ 2 + y ^ 2 = 1 Find the surface fraction FF ∑ DS / (x ^ 2 + y ^ 2 + Z2), where ∑ is the cylindrical surface between the plane z = 0 and z = 1, x ^ 2 + y ^ 2 = 1 PS: add a small question 4x + 2yin (x + radical (1 + x ^ 2)) to find the partial derivative of X. how can the answer be 4 + (2Y) / radical (1 + x ^ 2)?

For the area 0 of the projection of the cylindrical surface x ^ 2 + y ^ 2 = 1, only the plane z = 0 and z = 1 + X can be calculated, and the plane z = 0 is substituted into the projection of the plane z = 1 + X: x ^ 2 + y ^ 2