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Integers

Question 4i F...

Question

Question 4(i)
Find
$\frac{2}{5} \div \frac{1}{2}$

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Solution

$\frac{2}{5} \div \frac{1}{2} = \frac{2}{5} \times \frac{2}{1} = \frac{2 \times 2}{5 \times 1} = \frac{4}{5}$

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(\frac{1}{1 - 4 i} - \frac{2}{1 + i}) (\frac{3 - 4 i}{5 + i})

Question 4(i)
Evaluate:

$\frac{8^{- 1} \times 5^{3}}{2^{- 4}}$

(\frac{1}{1 - 4 i} - \frac{2}{1 + i}) (\frac{3 - 4 i}{5 + i})

to the standard form.

Reduce $[\frac{1}{1 - 4 i} - \frac{2}{1 + i}] = [\frac{3 - 4 i}{5 + i}]$ to the standard form.

\sqrt{\frac{2 + 3 i}{5 - 4 i} + \frac{2 - 3 i}{5 + 4 i}} = a + i b

82 b^{2} =

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