Question

If f(x)=3[x-2],what is f(5.9)?
9
10
11
12

Answer 1

Answer: 12

Explanation:

We know that , the ceiling function y = [x] is also known as the least integer function that gives the smallest integer greater than or equal to x.

For example : For x= 1.5

y = [1.5] =2

For x= 3.64

y = ⌊3.64⌋=4

The given function :
`f(x)=3[x-2]`

Then, for x= 5.9 , we have

`f(5.9)=3[5.9-2]\\\\ f(5.9)=3[3.9]\\\\ f(5.9)=3(4)=12` [since [3.9]=4 (least integer function)]

Therefore, the value of f(5.9) is 12