If f is a real function satisfying 
for all x ∈ R – {0}, then write the expression for f (x).
{since, (a + b)2 = a2 +b2 +2ab}
f(y) = 
x + 1 = xy
x2 -yx+1= 0
for x to be real
y ∈(-∞,2]∪[2,∞)
|y|>2
Ans.
1
If f is a real function satisfying for all x ∈ R – {0}, then write the expression for f (x).
{since, (a + b)2 = a2 +b2 +2ab}
f(y) =
x + 1 = xy
x2 -yx+1= 0
for x to be real
y ∈(-∞,2]∪[2,∞)
|y|>2Ans.