31. If f(x+y)=f(x)+f(y)+c,for all real x and y and f(x) is continuous at x =0 And f'(0)=1 then f'(x)=

31. If f(x+y)=f(x)+f(y)+c,for all real x and y and f(x) is continuous

1.	31. If f(x+y)=f(x)+f(y)+c,for all real x and y and f(x) is continuous at x =0 And f'(0)=1 then f'(x)=
Answer» 31. If f(x+y)=f(x)+f(y)+c,for all real x and y and f(x) is continuous at x =0 And f'(0)=1 then f'(x)=

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31. If f(x+y)=f(x)+f(y)+c,for all real x and y and f(x) is continuous at x =0 And f'(0)=1 then f'(x)=

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