GoldRush18
  • GoldRush18
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)]
Mathematics
katieb
  • katieb
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experimentX
  • experimentX
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
experimentX
  • experimentX
try no 2, and alert me if you are stuck ..
GoldRush18
  • GoldRush18
ok im gonna try it

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GoldRush18
  • GoldRush18
f(8)=x/4 =8/4 =2 so 2<3 so f(x)= 2-3= -1?
experimentX
  • experimentX
yes ... you are right!!
GoldRush18
  • GoldRush18
omg i got it :)
GoldRush18
  • GoldRush18
thanks
experimentX
  • experimentX
yw

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