∫∫(x+y)dxdy ,d là miền giới hạn bởi x²+y²=1

It looks like you want to compute the double integral

over the region D with the unit circle x ² + y ² = 1 as its boundary.

Convert to polar coordinates, in which D is given by the set

D = {(r, θ) : 0 ≤ r ≤ 1 and 0 ≤ θ ≤ 2π}

and

x = r cos(θ)

y = r sin(θ)

dx dy = r dr dθ

Then the integral is

55/i dont know i do it for the points

step-by-step explanation:

mx+89b(-98)nb

step-by-step explanation: