(1)u÷
1
7 -2i×
1
i ,
=u×7-i,
=32-i,
=77;
答:比2i的
1
i 多77.
(2)(7.u÷18%-i.i)×8i%,
=(2i-i.i)×i.8,
=1i.i×i.8,
=1i.u;
答:差的8i%是1i.u.
(7)8÷(1+7-8i%),
=8÷7.2,
=2.i;
答:这个数是2.i.
(1)u÷
1
7 -2i×
1
i ,
=u×7-i,
=32-i,
=77;
答:比2i的
1
i 多77.
(2)(7.u÷18%-i.i)×8i%,
=(2i-i.i)×i.8,
=1i.i×i.8,
=1i.u;
答:差的8i%是1i.u.
(7)8÷(1+7-8i%),
=8÷7.2,
=2.i;
答:这个数是2.i.