if f(x) = 5x+7 find f(f(1))
2007-05-21 19:35:32 · 7 answers · asked by bransred 1 in Science & Mathematics ➔ Mathematics
Singapore
f(1) = 5 + 7 = 12
f[f(1)] = 5 x 12 + 7 = 67
2007-05-21 19:41:03 · answer #1 · answered by sky_blue 1 · 0⤊ 0⤋
man I have never done weird problems like this. But I guess they are good for practice...as finding f(something) is pretty common in calculus.
if f(x)=5x+7
I'm guessing that f[f(1)]=5[5(1)+7]+7
You just replace the x in the original f(x) function with F(1). The rest is just adding and multiplying. Good luck with your precal stuff. Cal is much more interesting.
2007-05-21 19:41:34 · answer #2 · answered by alexk 2 · 0⤊ 0⤋
f(x)=5x+7
f(1)=5(1)+7
=5+7
=12
2007-05-21 19:58:07 · answer #3 · answered by pud123423 2 · 0⤊ 0⤋
f(1) = 5*1 + 7 = 12
so f(f(1)) = f(12), where
f(12) = 5*12 + 7 = 67
2007-05-21 19:40:16 · answer #4 · answered by Eddie K 4 · 1⤊ 0⤋
f(x) = 5x+7
f(f(1)) = f(12) = 67
2007-05-21 19:38:51 · answer #5 · answered by Anonymous · 2⤊ 0⤋
f(f(1))
f(5*1+7)
f(12)
5*12+7
67
2007-05-21 20:31:38 · answer #6 · answered by sothanaphan 2 · 0⤊ 0⤋
f(f(1)) = f(12) = 67
Doug
2007-05-21 19:40:05 · answer #7 · answered by doug_donaghue 7 · 0⤊ 0⤋