/ જો f (x) = હોય જયાં x c Z - {– 1, 0, 1} તો સાબિત કરો કે _f(x + 1) - f (x – 1) – 1 12

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( 2 frac{sqrt{-frac{n}{2}}-frac{2}{2}}{frac{1}{4}} ) ( f(x)=frac{1}{x}=frac{1}{x}, 0,13 ) ( f(x+1)=frac{1}{x+1} ) ( f(x-1)=frac{1}{x} ) ( f(x+1)-f(x-1) ) ( =frac{1}{x+1}-frac{1}{x-1} ) ( frac{x-1-x-1}{x^{2}-1} ) ( frac{2}{1-x^{2}}+sin x )

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