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( f(x)=2 x x+1 হলে- ) i. ( lim _ x rightarrow infty f(x)=2 ) ii. ( frac d dx [f(x)]=2 (x+1)^ 2 ) iii. ( lim _ x rightarrow 2 f(x)=f(2) ) নিচের্র কোনটি সঠিক? | Suva Ai