Double integral over a general region Integrate the function f(x, y) = x + y over the region R bounded by the lines y = x, x = 1 and y = -1. [ $ (z,y ) dA = 1 R Check (3) Calculator Overview standard function logic vector abc unit The ENG Search ZA US JS VivoBook F5 FO F10 FV2 F2 F3 F4 FZ F8 FO Prt Sc -O