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g^4 - 9
3x+5
If f(x)=2z^2+5 and g(x)=x^2-2, fine (f-g)(x)
In mathematics it could represent the combination of two functions. e.g. f = 2x + 3 g = 5x + 9 Hence fg = f(g) = 2(5x + 9) + 3 fg = 10x + 18 + 3 fg = 10x + 21
f(x) = 3x + 9 y = 3x + 9 so 3x = y - 9 x = y/3 - 3 Therefore, the inverse function is g(x) = x/3 - 3