Posted by Kelli on Thursday, January 3, 2013 at 9:23pm.
If you mean H(x) = sqrt(x^2 + 8), the f and g functions could be
g(x) = x^2 +8
and
f(x) = sqrt(x)
But there are other possibilities. For example
g(x) = (x^2 + 8)^2 and
f(x) = x^1/4
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