Question:
What is f(1) s f(4) equal to?
What is f(1) s f(4) equal to?
Options:
- a) 4
- b) 8
- c) 9
- d) 18 Direction for Questions (67-68): Consider the following for the two (02) items that follow: A function f is such that f(xy) = f(x + y) for all real values of x and y and f(5) = 10
- a) 4
- b) 8
- c) 9
- d) 18 Direction for Questions (67-68): Consider the following for the two (02) items that follow: A function f is such that f(xy) = f(x + y) for all real values of x and y and f(5) = 10
correct answer : c)
Explanation:
f
f
()
()
4
2
= f(2)
Þ f(4) = 3 × 3 = 9
f
f
()
()
2
2
= f(1)
Þ f(1) = 1
Now, f(1) f(4) = 1 × 9 = 9
f
f
()
()
4
2
= f(2)
Þ f(4) = 3 × 3 = 9
f
f
()
()
2
2
= f(1)
Þ f(1) = 1
Now, f(1) f(4) = 1 × 9 = 9