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যদি ( f(x)=x 3 ) এবং ( g(x)=x^ 2 ) হয়, তবে - i. ( int f(x) d x= frac x^ 2 6 +c ) ii. ( int -1 1+g(x) d x=- cot x+c ) iii. ( g^ prime prime (0)=2 ) নিচের কোনটি সঠিক? | Suva Ai