Point 11 of 11 — Unit 1: Complex Numbers, the Quadratic Equation, Sign of a Function and Quadratic InequalitiesQuestion bank: 0 questions (0 with pictures)
111-11 Applications: radicals and verbal problems
The domain of √f(x) is the solution set of f(x) ≥ 0.
The denominator √f(x) requiresf(x) > 0 (strict, because the denominator may not vanish).
Verbal problems (area, consecutive numbers, projectile height): choose the unknown, express the quantities in terms of it, form the inequality or equation, solve, then reject any value that the situation forbidssuch as a negative length.
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