Set, Relation and FunctionHard
Question
Let f(x) be continuous and differentiabls function for all reals f(x + y) = f(x) - 3xy + f(y).
If
= 7 then the value of f′(x) is :-
If
= 7 then the value of f′(x) is :-Options
A.-3x
B.7
C.-3x + 7
D.2f(x) + 7
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