Complex Numbers and Quadratic Equations

Let S= \z :|z-1|=1 and ( 2-1)(z+ z)-i(z- z)=2 2 \. Let z1, z2 be such that |z1|= z S|z| and |z2|= z S|z|. Then | 2z1-z2 |2 equals :

1. 1
2. 4
3. 3
4. 2

Let S= \x :( 3+ 2)x+( 3- 2)x=10 \. Then the number of elements in S is :

1. 4
2. 0
3. 2
4. 1

Let P=\z C: |z+2-3i| 1\ and Q=\z C: z(1+i)+ z(1-i) -8\. Let in P , |z-3+2i| be maximum and minimum at z1 and z2 respectively. If |z1|2+2|z2|2= + 2, where , are integers, then + equals .

If z is a complex number such that |z| 1, then the minimum value of |z+ 12(3+4 i) | is :

1. 2
2. 52
3. 32
4. 3

Let and be the roots of the equation p x2+q x-r=0, where p 0. If p, q and r be the consecutive terms of a non constant G.P. and 1 + 1 = 34, then the value of ( - )2 is :

1. 8
2. 9
3. 203
4. 809

Let S be the set of positive integral values of a for which ax2+2(a+1)x+9a+4x2-8x+32<0, x R. Then, the number of elements in S is :

1. 0
3. 3
4. 1

For 0<c<b<a, let (a+b-2c)x2+(b+c-2a)x+(c+a-2b)=0 and 1 be one of its roots. Then, among the two statements

1. only (II) is true
2. Both (I) and (II) are true
3. only (I) is true
4. Neither (I) nor (II) is true

Let a be the sum of all coefficients in the expansion of (1-2x+2x2 )2023 (3-4x2+2x3 )2024 and b= x 0 ( 0x (1+t)t2024+1dtx2 ). If the equations cx2+dx+e=0 and 2bx2+ax+4=0 have a common root, where c, d, e R, then d : c : e equals

1. 2 : 1 : 4
2. 1 : 1 : 4
3. 1 : 2 : 4
4. 4 : 1 : 4

If denotes the number of solutions of |1-i|x=2x and = ( |z| (z) ), where z= 4(1+i)4 [ 1- i +i+ -i1+ i ], i= -1, then the distance of the point ( , ) from the line 4x-3y=7 is .

Let z1 and z2 be two complex numbers such that z1+z2=5 and z13+z23=20+15i. Then, |z14+z24 | equals -

1. 15 15
2. 30 3
3. 25 3
4. 75