Solutions

Problem Set 7

Functions

1) if f(x) = x² and f(x) = 25, what was x? either 5 or -5. both result in a function value of 25 if used

2) if f(x) = sin(x) and f(x) = 1, what was x? many possibilities … π/2, - π/2, 3 π/2, -3 π/2 etc. Any odd multiples of π/2 in general.

3) if f(x) = 2x + 8 and f(x) = 32, what was x? 12, since f(12) = 32