Question:
What if f(20) + f(-20) equal to?
What if f(20) + f(-20) equal to?
Options:
- a) 0
- b) 10
- c) 20
- d) 40 Direction for Questions (69-70): Consider the following for the two (02) items that follow: Let f(x) = [x 2], where [,] is the greater integer function.
- a) 0
- b) 10
- c) 20
- d) 40 Direction for Questions (69-70): Consider the following for the two (02) items that follow: Let f(x) = [x 2], where [,] is the greater integer function.
correct answer : c)
Explanation:
f(0·5) = f(0 + 5) = f(0) = f(5) = 10
f(0·20) = f(0 + 20) Þ f(0) = f(20) = 10
f(0 × -20) = f(0 – 20) Þ f(0) = f(-20) = 10
\ f(20) + f(-20) = 10 + 10 = 20
f(0·5) = f(0 + 5) = f(0) = f(5) = 10
f(0·20) = f(0 + 20) Þ f(0) = f(20) = 10
f(0 × -20) = f(0 – 20) Þ f(0) = f(-20) = 10
\ f(20) + f(-20) = 10 + 10 = 20