Question

Verify that f₂(3) and f₃(3) = 19.

a) True
b) False

Answer 1

The student's question regarding the functions f2(3) and f3(3) is unanswerable without additional information. However, for the provided physics statements: the Pythagorean theorem can be used for vectors at right angles, waves of different frequencies can superimpose, and Newton's Third Law states equal and opposite forces.

Step-by-step explanation:

The student's question appears to be a mixture of different problems, none of which clearly state the function f2 or f3, nor do they provide the means to verify that f2(3) and f3(3) equals 19. However, answering the sample physics-related problems provided:

1. True or False-We can use Pythagorean theorem to calculate the length of the resultant vector obtained from the addition of two vectors which are at right angles to each other. True.
2. Waves can superimpose if their frequencies are different. True.
3. For one object exerting a force on another, the magnitudes of the two forces are equal and opposite, Newton's Third Law of Motion. This means F1 and F2 are equal in magnitude but opposite in direction. True.