exam Maths Puzzle Numerical Ability

Find all (vertical and horizontal) asymptotes of f(x) = 2x^2 + 4x + 2 / 1-x^2. What is the domain of this function?

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exam Other Question

A telephone number consist of seven digits the first three representing the exchange. How many different telephone numbers are possible with in the 537 exchange? Graph the inequality.
y > 1