Let f(x) = x + 8 and g(x) = x2 - 6x - 7. Find f(g(2)).
Solution:
Given, f(x) = x + 8
g(x) = x2 - 6x - 7
We have to find f(g(2)).
f(g(x)) = f(x2 - 6x - 7)
= (x2 - 6x - 7) + 8
= x2 - 6x - 7 + 8
f(g(x)) = x2 - 6x + 1.
Put x = 2 in the above expression,
f(g(2)) = (2)2 - 6(2) + 1
= 4 - 12 + 1
= 5 - 12
f(g(2)) = -7
Therefore, the value of f(g(2)) is -7.
Let f(x) = x + 8 and g(x) = x2 - 6x - 7. Find f(g(2)).
Summary:
Let f(x) = x + 8 and g(x) = x2 - 6x - 7. The value of f(g(2)) is -7.
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