if f(x) =x^(2) + (x^(2))/(1+x^(2)) + (x...

if ` f(x) =x^(2) + (x^(2))/(1+x^(2)) + (x^(2))/((1+x^(2))^(2)) +……" upto" oo ` , then

has no limit

is discontinuous

is continuous but not differentiable

is differentiable

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