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[" 2.Let "f(x)=a^(x)(a>0)" be written as...

[" 2.Let "f(x)=a^(x)(a>0)" be written as "f(x)=f_(1)(x)+f_(2)(x)],[" where "f(x)=a" an even function and "f_(2)(x)" is an odd "],[" function.Then "f_(1)(x+y)+f_(1)(x-y)" equals "],[[" (c) "2f(x+y)=f(x-y)," (b) "2f(x+y)-f_(1)(x-y),," (x-y) "]]

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