Which of the following numbers are equal to their reciprocals.
AB & CD are lines with equations 2 – y + 2 = 0 & – 2y = 2 respectively, where
A & C are y – intercepts & B & D are – intercepts of the respective lines.
z1 ,z2 , z3 are complex numbers such that the modulus of each number is equal to the modulus of the sum of reciprocals of these numbers , which is equal to 1. Find the modulus of sum of these three numbers
Question 05
Which of the following rational number is equal to its reciprocal?
(a) 1
(b) 2
(c) 12
(d) 0