Question

The function f on R is defined by
F(X)={x-3 if x<=3
{x/4 if x>3

Find the value of
i. f [f(20)]
ii. f [f(8)]
iii. f [f(3)]

Answer 1

okay ... i'll do the first example ... you do the rest
20 > 3 then F(x) = x/4 .... right??
f(20) = 20/4 = 5


again, 5>3, so F(x) = x/4 ... so
f(5) = 5/4 = 1.25 :D

Answer 2

try no 2, and alert me if you are stuck ..

Answer 3

ok im gonna try it

Answer 4

f(8)=x/4
=8/4
=2

so 2<3 so f(x)= 2-3= -1?

Answer 5

yes ... you are right!!

Answer 6

omg i got it :)

Answer 7

thanks

Answer 8

yw