Several concepts of advanced numbers, If the function f (x, y) has a minimum at point (x0, Y0), then (x0, Y0) must be a function of F (x, y) The minimum value of a continuous point B in the domain of definition C the minimum value of stationary point D in a certain field (x0, Y0) Let f (x), G (x) be continuous on [a, b], and f (x) ≥ g (x), then A ∫ (upper limit B, lower limit a) f (x) DX ≥ ∫ (B, a) g (x) DX B ∫(b,a)f(x)dx≤∫ (b,a)g(x)dx C ∫ f(x)dx≥∫ g(x)dx D ∫ f(x)dx=∫ g(x)dx What is the divergence of the following generalized integrals A ∫ (upper limit + ∞, lower limit 0) DX / 1 + x ^ 2 B ∫ (1,0) DX / radical 1-x ^ 2 C ∫(+∞,e)(lnx/x)dx D ∫(+∞,e)e^-x dx The continuity of function f (x, y) in P 0 (x 0, y 0) is the existence of the first partial derivative of F (x, y) in P 0 (x 0, y 0) A necessary condition B sufficient condition C necessary and sufficient condition D neither necessary nor sufficient condition Let f (x, y) = {(x ^ 2) y / x ^ 4 + y ^ 2 (x, y) not = (0,0); 0 (x, y) = (0,0) Alim (x, y) → (0,0) f (x, y) exists and f (x, y) is discontinuous at (0,0) B LIM (x, y) → (0,0) f (x, y) does not exist, f (x, y) is discontinuous at (0,0) C LIM (x, y) → (0,0) f (x, y) exists and f (x, y) is continuous at (0,0) D LIM (x, y) → (0,0) f (x, y) does not exist, f (x, y) is continuous at (0,0) Let a = ∫ (2,1) lnxdx, B = ∫ (2,1) | LNX | DX, then A a=b B a＞b C a＜b D a≥h

Several concepts of advanced numbers, If the function f (x, y) has a minimum at point (x0, Y0), then (x0, Y0) must be a function of F (x, y) The minimum value of a continuous point B in the domain of definition C the minimum value of stationary point D in a certain field (x0, Y0) Let f (x), G (x) be continuous on [a, b], and f (x) ≥ g (x), then A ∫ (upper limit B, lower limit a) f (x) DX ≥ ∫ (B, a) g (x) DX B ∫(b,a)f(x)dx≤∫ (b,a)g(x)dx C ∫ f(x)dx≥∫ g(x)dx D ∫ f(x)dx=∫ g(x)dx What is the divergence of the following generalized integrals A ∫ (upper limit + ∞, lower limit 0) DX / 1 + x ^ 2 B ∫ (1,0) DX / radical 1-x ^ 2 C ∫(+∞,e)(lnx/x)dx D ∫(+∞,e)e^-x dx The continuity of function f (x, y) in P 0 (x 0, y 0) is the existence of the first partial derivative of F (x, y) in P 0 (x 0, y 0) A necessary condition B sufficient condition C necessary and sufficient condition D neither necessary nor sufficient condition Let f (x, y) = {(x ^ 2) y / x ^ 4 + y ^ 2 (x, y) not = (0,0); 0 (x, y) = (0,0) Alim (x, y) → (0,0) f (x, y) exists and f (x, y) is discontinuous at (0,0) B LIM (x, y) → (0,0) f (x, y) does not exist, f (x, y) is discontinuous at (0,0) C LIM (x, y) → (0,0) f (x, y) exists and f (x, y) is continuous at (0,0) D LIM (x, y) → (0,0) f (x, y) does not exist, f (x, y) is continuous at (0,0) Let a = ∫ (2,1) lnxdx, B = ∫ (2,1) | LNX | DX, then A a=b B a＞b C a＜b D a≥h

D
A
C
D
B
A