わからないので、至急教えてくださると助かります!
16 percent of the cars sold in Europe was made outside Europe.
16 percent of the cars sold in Europe was made outside Europe.
(1) z=1+iのとき 22を極形式で表せ. (2) 2つの複素数 α, β について, 1 |a|=|B|=1のとき,|a+Bl=1/12/2+ B を示せ.S