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If the function f : R → R is given by f(x) = x^2 + 3x + 1 and g : R → R is given by g(x) = 2x-3, then find

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If the function f : R → R is given by f(x) = x2 + 3x + 1 and g : R → R is given by g(x) = 2x-3, then find 

(i) fog

(ii) gof

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(a) fog(x) = f(g(x))

(b) gof(x) = g(f(x))

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