Find g[f(5)] if f(x) = x + 1 and g(x) = 3x - 2.?
回答 (7)
2009-07-13 4:36 pm
✔ 最佳答案
g (f (x)) = 3 (x + 1) - 2 = 3x + 3 - 2 = 3x + 1<=>
g (f (5)) = 3 (5) + 1 = 15 + 1 = 16
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2009-07-14 3:13 am
g ( f ( x ) ) = g ( x + 1 ) = 3 x + 1
g ( f ( 5 ) ) = 16
g ( f ( 5 ) ) = 16
2009-07-14 12:10 am
f(x) = x + 1
g(x) = 3x - 2
g(x) â g[f(x)] = g(x + 1)
g(x + 1) = 3(x + 1) - 2
g(x + 1) = 3x + 3 + 2
g(x + 1) = 3x + 5
g(x) â g[f(x)] â g[f(5)] = g(5 + 1)
g(5 + 1) = 3(5 + 1) - 2
g(6) = 3(6) - 2
g(6) = 18 - 2
g(6) = 16
g(x) = 3x - 2
g(x) â g[f(x)] = g(x + 1)
g(x + 1) = 3(x + 1) - 2
g(x + 1) = 3x + 3 + 2
g(x + 1) = 3x + 5
g(x) â g[f(x)] â g[f(5)] = g(5 + 1)
g(5 + 1) = 3(5 + 1) - 2
g(6) = 3(6) - 2
g(6) = 18 - 2
g(6) = 16
2009-07-14 12:09 am
g[f(5)]=3(x+1)-2
=3x+3-2
=3x+1
=3(5)+1
=15+1
=16 answer//
=3x+3-2
=3x+1
=3(5)+1
=15+1
=16 answer//
2009-07-13 11:36 pm
f(5)= 5+1=6
g(f(5)) = g(6) = 3x6 - 2 =18 - 2 = 16
g(f(5)) = g(6) = 3x6 - 2 =18 - 2 = 16
2009-07-13 11:38 pm
f(x) = x + 1
Putting x = 5,
f(5) = 5 + 1 = 6
g(x) = 3x - 2
g[f(5)] = 3[f(5)] - 2
= 3(6) - 2
= 18 - 2
= 16
Hence, the ans. is 16
Putting x = 5,
f(5) = 5 + 1 = 6
g(x) = 3x - 2
g[f(5)] = 3[f(5)] - 2
= 3(6) - 2
= 18 - 2
= 16
Hence, the ans. is 16
2009-07-13 11:37 pm
g ( f (x) )
= 3 * f(x) - 2
= 3 * (x + 1) - 2.
To find g(f(5)), just substitute x by 5.
= 3 * f(x) - 2
= 3 * (x + 1) - 2.
To find g(f(5)), just substitute x by 5.
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