Question

Se f(x)=|x-3|-|2-x| entao f(-2)e igual a?

Answer 1

f(x)=|x-3|-|2-x|

Com f(-2), temos:

f(-2) = |x-3|-|2-x|
f(-2) = |-2-3|-|2-(-2)|
f(-2) = |-5|-|2+2|
f(-2) = |-5|-|4|
f(-2) = 5 - 4
f(-2) = 1

=)