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Grade 12th PassAlgebra

Let z1 and z2 be any 2 complex number.Now,

Statement 1:|z1 - z2| >= |z1| - |z2|

Statement 2:|z1 + z2|<= |z1| + |z2|

Are both correct?And is statement 2 a correct explanation of statement 1?

Profile image of Arghadeep Ghosh
14 Years agoGrade 12th Pass
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2 Answers

Profile image of Jitender Singh
12 Years ago
Ans:
Hello Student,
Please find answer to your question below

Triangular Inequality:
||z_{1}|-|z_{2}|| \leq |z_{1} \pm z_{2}| \leq |z_{1}| + |z_{2}|
So
||z_{1}|-|z_{2}|| \leq |z_{1} - z_{2}|
|z_{1} + z_{2}| \leq |z_{1}| + |z_{2}|
They are true on their own.
So both statement are true independently and statement 2 is not an explanation of statement 1.
Profile image of Abhishek Pachauri
12 Years ago
both are correct but statement 2 is not a correct explanation or statement 1.