J Jen123 New member Joined Oct 21, 2006 Messages 31 Feb 1, 2007 #1 Given that f(x) = 3x and g(x) = 4x - 3, find f[g(5)] and g[f(5)]. I'm not sure where to begin on this problem, so can someone coach me through this please? Thank you!
Given that f(x) = 3x and g(x) = 4x - 3, find f[g(5)] and g[f(5)]. I'm not sure where to begin on this problem, so can someone coach me through this please? Thank you!
skeeter Elite Member Joined Dec 15, 2005 Messages 3,204 Feb 1, 2007 #2 f(x) = 3x f(5) = 3(5) = 15 g(x) = 4x - 3 g(5) = 4(5) - 3 = 17 f[g(5)] = f(17) = 3(17) = 51 g[f(5)] = g(15) = 4(15) - 3 = 57 kapish?
f(x) = 3x f(5) = 3(5) = 15 g(x) = 4x - 3 g(5) = 4(5) - 3 = 17 f[g(5)] = f(17) = 3(17) = 51 g[f(5)] = g(15) = 4(15) - 3 = 57 kapish?
