A.sqrt(1+x) B.(sqrt(1+x))/(2) C.(sqrt(1+x))/(sqrt(x)) D.(sqrt(1+x))/(2sqrt(x)
sqrt (2)-|||-C. sqrt (34)-|||-○ D. sqrt (2)
[ -sqrt (2),sqrt (2)] D. [ -sqrt (2),0]
=ln (x+sqrt ({a)^2+(x)^2});
[ sqrt (3),2] -|||-C. [ -2,-sqrt (3)] D. [ -2,-sqrt (3)] cup [ sqrt (3),2]
函数=x+sqrt (1-x)的极值为( )=x+sqrt (1-x)=x+sqrt (1-x)=x+sqrt (1-x)=x+sqrt (1-
(2) (x)=ln (x+sqrt (1+{x)^2});
若 (x)=ln (x+sqrt (1+{x)^2}) 则 (x)=dfrac (1)(sqrt {1+{x)^2}}-|||-5-|||-○ C.若 (x)=
8 ) =ln (x+sqrt ({a)^2+(x)^2}) );
sqrt (2)pi :2 C. sqrt (2)pi :4 D. sqrt (2)pi :8