Complex Numbers And Quadratic Equations question 449
Question: The multiplication inverse of a number is the number itself, then its initial value is [RPET 2003]
Options:
A) i
B) - 1
C) 2
D) - i
Show Answer
Answer:
Correct Answer: B
Solution:
We know that, multiplicative inverse of $ x+iy $ is $ \frac{1}{x+iy} $ According to question $ x+iy=\frac{1}{x+iy} $ and only (b) is satisfying such condition.
BETA
