1.

`f(x) = {{:((|x|)/(x)",",x ne 0),(0",",x = 0):}`

Answer» Correct Answer - असांतत्य बिन्दु x = 0 पर
संकेत : `f(x) = {{:(1,"यदि",x gt 0),(0,"यदि",x = 0),(-1,"यदि",x lt 0):}`
चूँकि `|x| = x, x gt 0, |x| = - x, x lt 0`


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