If $$f:R-\left\{-1\right\} \to R$$ and $$f$$ is differentiable function satisfies: $$f((x)+f(y)+xf(y))=y+f(x)+y f(x)\forall x, y\ \in R-\left\{-1\right\}$$. Find $$f(x)$$.
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Q3
If f(x) satisfies the relation f(x+y)=f(x)+f(y) for all x,y∈R and f(1)=5, then
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Q4
If f(x) is an odd function then- (i)f(−x)+f(x)2 is an even function (ii)[∣f(x)∣+1] is even where [.] denotes greatest integer function. (iii)f(x)−f(−x)2 is neither even nor odd (iv)f(x)+f(−x) is neither even nor odd Which of these statements are correct
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Q5
Assertion :If f(x+y)+f(x−y)=2f(x)f(y)∀x,y∈R and f(0)≠0, then f(x) is an even function. Reason: If f(−x)=f(x), then f(x) is even