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Given that

$$F=\frac{\left|z_1+z_2\right|}{\left|z_1\right|+\left|z_2\right|},$$

where $z_1=2+3 i$ and $z_2=-2+3 i$ with $i=\sqrt{-1}$, which one of the following options is $\text{CORRECT}$?

  1. $F<0$
  2. $F<1$
  3. $F>1$
  4. $F=1$
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