NZ Level 7 (NZC) Level 2 (NCEA)
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Defineable rational expressions

Interactive practice questions

In the following expression, what values are not allowable as substitutions for the variable $x$x? Write your answer as an equation. If there is more than one value, make sure to enter all appropriate values separated by a comma.

$\frac{1}{x}$1x

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In the following expression, what values are not allowable as substitutions for the variable $x$x? Write your answer as an equation. If there is more than one value, make sure to enter all appropriate values separated by a comma.

$\frac{4}{15x}$415x

In the following expression, what values are not allowable as substitutions for the variable $z$z? Write your answer as an equation. If there is more than one value, make sure to enter all appropriate values separated by a comma.

$\frac{1}{z+7}$1z+7

In the following expression, what values are not allowable as substitutions for the variable $y$y? Write your answer as an equation. If there is more than one value, make sure to enter all appropriate values separated by a comma.

$\frac{y}{y-8}$yy8

Outcomes

M7-6

Manipulate rational, exponential, and logarithmic algebraic expressions

91261

Apply algebraic methods in solving problems

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