The following table shows the signs of coordinates in eight octants-Whe- I - II - III - IV - V - VI - VII - VIII Whline x -8-8-8-8-8-8-11 hliney -8-8-8-11 hlinez -111 hinelendarray If a point lies in xy-plane then what is its z-coordinate-

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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.

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

If a point lies in xy-plane then what is its z-coordinate?

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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}

Which of the following are rational numbers?
(i) $\frac{5}{- 8}$

(ii) $\frac{- 6}{11}$

(iii) $\frac{7}{15}$

(iv) $\frac{- 8}{- 12}$

(v) $6$

(vi) $- 3$

(vii) $0$

(viii) $\frac{0}{1}$

(ix) $\frac{1}{0}$

(x) $\frac{0}{0}$

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