book Maths Puzzle Numerical Ability

Any values that would cause a denominator to equal 0 must be excluded from the domain and consequently as solutions of an equation that has variable expressions in the denominators

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book Other Question
Given f(x)=2(x+2)^2-1 what is the domain, range, vertex, y intercept, and axis of symmetry (sketch the Graph). Determine the equation of a line parallel to 2x - 5y = 4 and passes through (4,0).