FINDING FUNCTION VALUES FROM THE GRAPH OF EPRIODIC FUNCTIONS WORKSHEET

Problem 1 :

The graph has the period of 7. Find the value of 

a) f(6)     b)  f(20)

finding-values-from-periodic-graphq1

Solution

Problem 2 :

The function shown is periodic

a) Find the period of the function

b) Find f(4), f(5), f(8) and f(13)

c) Find the amplitude of the function.

finding-values-from-periodic-graphq2

Solution

Problem 3 :

A periodic function f has a period of 12. If f(7) = -2 and f(11) = 9, determine the value of 

i) f(43)     ii) f(79)     iii) f(95)     iv) f(-1)

Solution

Problem 4 :

For a periodic function f(x) with period p, f(x + p) = f(x), and f(x + np) = f(x), where n is any integer. Consider the periodic function shown. 

finding-values-from-periodic-graphq3.png

(a) What is the period of the function?

(b) Determine f(2) and f(5)

c) Predict f(8) and f(-10)

d) What is the amplitude of the function ?

e) Determine four x-values such that f(x) = 2.

Solution

Answer Key

1)  a)  f(6) = -1 and b)  f(20) = -1

2) a)  Period of the function is 3

b)  f(4) = 3, f(5) = 1, f(8) = 1, f(13) = 3.

c)  amplitude = 3

3)  a)  f(43) = -2, b)  f(79) = -2, c)  f(95) = 11, d)  f(-1) = 9

4)  a) 6 units.

b) f(2) = 1 and f(5) = 0.

c) f(8) = 1, f(-10) = 1

d) amplitude = 3.

e)  -6, -12, 0 and 6.

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