Find the maximum rate change of the function integralx y3x1n

Find the maximum rate change of the function integral(x, y)=3x+(1n, y)^2 at(1, 1). 13 squareroot 13 3 squareroot 3 None of the above The directional derivative of integral(x, y)=3xy+y^2 at (2, 3) in the direction of v=4i+3 by 72 30 72/5 30/5 None of the above 2, 3/squareroot 4^2+3^2=2/5 i+3/5 j 18 2/5+ 9(3/5) 36 Given (1 1 0)