Equation of X-axis is:

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Solution

Q.
Equation of X-axis is:

1 $\frac{x}{1} = \frac{y}{1} = \frac{z}{1}$

2 $\frac{x}{0} = \frac{y}{1} = \frac{z}{1}$

3 $\frac{x}{1} = \frac{y}{0} = \frac{z}{0}$

4 $\frac{x}{0} = \frac{y}{0} = \frac{z}{1}$

Ans.
(3)

Ans. $\frac{x}{1} = \frac{y}{0} = \frac{z}{0}$

Explanation:

Since, on X-axis coordinates of $y$ and $z$ are zero.

$∴$ Equation of X-axis becomes

$\frac{x - 0}{1 - 0} = \frac{y - 0}{0 - 0} = \frac{z - 0}{0 - 0}$

$\Rightarrow$ $\frac{x}{1} = \frac{y}{0} = \frac{z}{0}$

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