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1
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( 1 ) =6+ = 0 / ***@0 AB5Z, iE
( 2 ) 3 b = 0
3^ Z[ = a + bi,z2 = c + di(a,b,c,d s R)
(1) ;2 =-l
(2) Z] ±4 =(+ + c) + (Z? + d)i
(3) Z]Q = (a+ bi) (c+ di) = ac+ adi + bci + bd= (ae- bd)+(ad + be)i
RSTUVWiXY#Z[\]^_`'abc8defg
hi!"j8dekl= 7
(4) Z1 _ a + bi _ (a + bi)(c - di) _ (ac + bd) + (bc-ad)i
z c + di (c + di)(c_di) c2 + d 2
2
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A. - B. - C. 1 D.
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1-2Z
a + 2b=i\ a = 5
.}.(a + 2) + (h m 2a)i = ll m 7in<
b-2a = -7 b = 3
.,.a + b = 8
=>'a + Z? = 8
9µz,
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D¾4 Ir- 1 ,
Hz2Grm
%&'Z2v¿À4 ÁÂWD;<ÃÄ¥ÅWÆÇ4 = 3+È D.ɶÊË
4' Z]=J + bi :.z2 = zx 4-zZj = a + bi-i{a-bi! = a-b-\-"b - a !i
:.a-b = -\ ~.z2Gr 1
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= l-i iG¢
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4' z2 =a + 2 i, Z[ =x + 2 + yi (Ï'*ÐÑÒÓÔË)V(Z1 -2)(1+ /) = 1-z
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/.x = O,y = - l z, = 2 -i
.Z]Õ = (2 - i) (a + 2i) = 2a + 2 + (4 - )i h I D;<a = 4
z2 =4 + 2i
=>'Z2 =4 + 2Z
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