[问答题]
Two equal but opposite charges are separated by a distance d, as shown in Ftw l(6wr4( olslh7oc6i 0a5o. *xkyqh7. xpbrzg. 17–27. Determine a formula x05b * po7rzxyhqa. .kfor $V_{BA}\,=\,V_B-V_A$ for points B and A on the line between the charges.