dfrac (1)(2)pi (R)^2E-|||-D. sqrt (2)(R)^2E-|||-E. dfrac (pi {R)^2E}(sqrt {2)}
dfrac (1)(2)-|||-C .dfrac (sqrt {2)}(2)-|||-D .dfrac (sqrt {3)}(2)
. _(Y)(y)=dfrac (1)(2sqrt {2pi )}(e)^-dfrac (y{2)} ,gt 0-|||-bigcirc ._(Y)(y)=d
4.欧氏空间R^3中的标准正交基是 () .-|||-(A) (dfrac (1)(sqrt {2)},0,dfrac (1)(sqrt {2)}), (dfr
dfrac ({mu )_(0)I}(pi R)(dfrac (1)(2)+dfrac (pi )(6))-|||-dfrac ({mu )_(0)I}(pi
(B) sqrt (dfrac {1cos theta )(g)} _ (C) pi sqrt (dfrac {1)(8)} . (D) pi sqrt (df
sqrt (dfrac {a)(a-1)} D. 3
(B) sqrt (2). (C) dfrac (sqrt {2)}(2) (D)1.
sqrt (2) C. dfrac (sqrt {2)}(2) D.1
第西意 不定积分-|||-(20)f(f(m(m+x)/√(1+x))dx;-|||-(10) sqrt (tan sqrt {1+{x)^2}}cdot df