1.

Let `f(x) = sqrt(log_(10)x^(2))`.Find the set of all values of x for which f (x) is real.

Answer» Correct Answer - `x le - 1 or x ge 1`
`log_(10)x^(2) ge 0`
` rArr log_(10)x^(2) ge log_(10) 1`
` rArr x^(2) ge 1`
` rArr x ge 1`
` or x le -1`.


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