1.

Solve `|(x+1)/x|+|x+1|=((x+1)^2)/(|x|)dot`

Answer» `|(x+1)/(x)|+|x+1|=((x+1)^2)/(|x|)`
or `|(x+1)/(x)|+|x+1|=|(x+1)/x+(x+1)|`
`or ((x+1))/(x)xx(x+1) ge 0 `
`or (x+1)^2/(x)ge 0 `
`rArr x in (0,oo) cup {-1}`


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