Question
$\left| {(1 + i)\frac{{(2 + i)}}{{(3 + i)}}} \right| = $
✓
Answer
c
(c)$\left| {(1 + i)\frac{{(2 + i)}}{{(3 + i)}}} \right| = |1 + i|\left| {\frac{{2 + i}}{{3 + i}}} \right| = \frac{{\sqrt 2 \times \sqrt 5 }}{{\sqrt {10} }} = 1$
.
(c)$\left| {(1 + i)\frac{{(2 + i)}}{{(3 + i)}}} \right| = |1 + i|\left| {\frac{{2 + i}}{{3 + i}}} \right| = \frac{{\sqrt 2 \times \sqrt 5 }}{{\sqrt {10} }} = 1$
.
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