If f(x)=int(2x), then find a. f(1.4), b. f(3.9), c. f(-1.2)

Question

What is int? how would I solve this?

Answer 1

f(x) = int(2x) is just another way of writing floor(2x), so for instance the answer to a. would be:

a. f(1.4) = floor(2*1.4) = floor(2.8) = the nearest integer below 2.8 = 2