The following table shows the signs of coordinates in eight octants-Whe- I - II - III - IV - V - VI - VII - VIII Whline x -11 hliney -8-8-8-8-11 hlinez -111 hinearray In which plane does the point 0-5-4 lie-

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Distance formula using Complex Numbers

The following...

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The following table shows the signs of coordinates in eight octants.

$\begin{matrix} I & I I & I I I & I V & V & V I & V I I & V I I I x & + & - & - & + & + & - & - & + y & + & + & - & - & + & + & - & - z & + & + & + & + & - & - & - & - \end{matrix}$

In which plane does the point (0, 5, -4) lie?

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\begin{matrix} I & I I & I I I & I V & V & V I & V I I & V I I I x & + & - & - & + & + & - & - & + y & + & + & - & - & + & + & - & - z & + & + & + & + & - & - & - & - \end{matrix}

\begin{matrix} I & I I & I I I & I V & V & V I & V I I & V I I I x & + & - & - & + & + & - & - & + y & + & + & - & - & + & + & - & - z & + & + & + & + & - & - & - & - \end{matrix}

\begin{matrix} I & I I & I I I & I V & V & V I & V I I & V I I I x & + & - & - & + & + & - & - & + y & + & + & - & - & + & + & - & - z & + & + & + & + & - & - & - & - \end{matrix}

- 11 - 60 \sqrt{- 1}

1 + 4 \sqrt{- 3}

Find the square root of the following complex numbers :

(i) -5 + 12 i

(ii) -7 - 24i

(iii) 1 - i

(iv) - 8 - 6i

(v) 8 - 15i

(vi) -11 - 64 $\sqrt{- 1}$

(vii) 1 + 4 $\sqrt{- 3}$

(viii) 4i

(ix) - i

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