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[" EXAMPLE "3" If "f(x)=(1)/(2x+1),x!=-(...

[" EXAMPLE "3" If "f(x)=(1)/(2x+1),x!=-(1)/(2)," then show that "f(f(x))=(2x+1)/(2x+3)," provided that "x!=-(3)/(2)],[" SOLUTION We have,"f(x)=(1)/(2x+1)]

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