dfrac (1)(2)pi .-|||-C.π-|||-D. dfrac (5)(4)pi .-|||-0
sqrt (2)pi -|||-C. dfrac (sqrt {2pi )}(4)-|||-D. dfrac (sqrt {2pi )}(8)
dfrac (q)(4pi varepsilon oR)-|||-C. dfrac (q)(4pi {varepsilon )_(0)(R)^2}-|||-D.
dfrac (qQ)(4pi {varepsilon )_(0)l} C. dfrac (qQ)(2pi {varepsilon )_(0)l} D. -dfr
(B) pi +dfrac (4)(3) (C) pi +2 . (D) pi +dfrac (8)(3)
[ 0,dfrac (pi )(2)] D. [ -sqrt (dfrac {pi )(2)},0]
dfrac (2pi )(sqrt {3)} D. dfrac (pi )(6)
dfrac (2pi )(sqrt {3)}-|||-D. dfrac (pi )(6)
-dfrac (1)(pi )-|||-D. dfrac (1)(pi )
dfrac (qQ)(4pi {varepsilon )_(0)(d)_(1)} B. dfrac (qQ)(2pi {varepsilon )_(0)(d)_