Introduction


Aptitude : : Complex Number Questions & Answers

  1. $|Z_1+Z_2|=?$

A. $>|Z_1|+|Z_2|$

B. $\leq|Z_1|+|Z_2|$

C. $\leq Z_1+Z_2$

D. $> Z_1+Z_2$

  1. Polar form of a complex number is :

A. r(tanθ + i cotθ)

B. r(secθ + i cosecθ)

C. r(cosθ + i sinθ)

D. r(sinθ + i cosθ)

  1. If Z1 = 2 + i and Z2 = 1 + 3i, then iRe(Z1 - Z2)

A. 1

B. i

C. 2i

D. 2

  1. a2 + b2 = ?

A. (a - b)(a + b)

B. (a - ib)(a + ib)

C. (a - b)(a + ib)

D. (a - ib)(a + b)

  1. In the equation x2 + 144 = 0, x is equal to which of the following ?

A. 12

B. 12i

C. -12

D. No Solution