1.

Let f(x)= underset(n to 00) (Lt) (x^(2n)-1)/(x^(2n)+1), then

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`f(X)=1"for" |x|=1 `
`f(x)={{:(1",", "for" |x| gt 1),(-1"m,", "for" |x| lt 1):}`
`f(x){{:(1",", "for" |x| gt 1),(-1"m,", "for" |x| le 1):}`
f is not defined for any VALUE of 'x'

Answer :B


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