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WAEC Mathematics 2019 Paper

Question : 20

Total: 50

\frac{3p - 1}{p^{2} - p}

undefined?

Solution:

Concept:

A fraction is undefined when its denominator equals zero.

Explanation:

Set the denominator to zero:

p^{2} - p = 0

Factor the expression:

p(p - 1) = 0

Solve for

p

p = 0 \quad \text{or} \quad p = 1

From the given options, only

p = 1

is present.

Thus, the expression is undefined when

p = 1

Answer:

1

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