Class 11Mathematics1 Complex Numbers and Quadratic Equations: Complex NumbersConjugate and Modulus of complex numbers
EasyWhat is the modulus of the complex number $(1+2i)(-2+i)$?
- A$\sqrt{5}$
- B$5$
- C$5\sqrt{5}$
- D$\sqrt{35}$
Explore More
Similar Questions
If $\frac{(p + i)^2}{2p - i} = \mu + i\lambda$,then $\mu^2 + \lambda^2$ is equal to
Medium
View SolutionLet $Z_1$ and $Z_2$ be any two complex numbers.
Statement $1: |Z_1 - Z_2| \ge |Z_1| - |Z_2|$
Statement $2: |Z_1 + Z_2| \le |Z_1| + |Z_2|$
Statement $1: |Z_1 - Z_2| \ge |Z_1| - |Z_2|$
Statement $2: |Z_1 + Z_2| \le |Z_1| + |Z_2|$
DifficultAIEEE 2012
View SolutionIf ${z_1}$ and ${z_2}$ are two complex numbers,then $|{z_1} + {z_2}|$ is
Medium
View SolutionIf $\alpha$ is the modulus of $z_1=4+3 i$,then a point that does not lie in the region represented by $|z-\overline{z_1}| \leq \alpha$ is
If $\left|z+\frac{2}{z}\right|=2$,then the maximum value of $|z|$ is
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo