Given that f(x) = 3x - 7 and g(x) = x² - 4, what is the value of f(g(f(3)))?
回答 (5)
2015-08-28 8:42 pm
✔ 最佳答案
f (3) = 2f [ g (2) ] = f [ 0 ] = - 7
2015-08-28 8:40 pm
f(3)
= 3(3) ‒ 7
= 2
g(f(3))
= g(2)
= (2)² ‒ 4
= 0
f(g(f(3)))
= f(0)
= 3(0) ‒ 7
= ‒7
= 3(3) ‒ 7
= 2
g(f(3))
= g(2)
= (2)² ‒ 4
= 0
f(g(f(3)))
= f(0)
= 3(0) ‒ 7
= ‒7
2015-08-28 8:46 pm
f(3) = 2
g(2) = 0
f(0) = -7
f(g(f(3))) = -7
g(2) = 0
f(0) = -7
f(g(f(3))) = -7
2015-08-28 8:40 pm
f(3) is 3*3 - 7. Do that calculation. Get the number. Call it a.
g(f(3)) is a^2 - 4. Do that calculation. Call it b.
f(g(f(3)) is 3*b - 7.
g(f(3)) is a^2 - 4. Do that calculation. Call it b.
f(g(f(3)) is 3*b - 7.
2015-08-28 8:40 pm
8
f(3) = 3
g(3^2-4) = 5
f((3*5)-7) = 8
f(3) = 3
g(3^2-4) = 5
f((3*5)-7) = 8
收錄日期: 2021-04-18 00:05:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150828123740AAzHoce