1.

If `log_(2)[-1+sqrt(x^(2)-14x+49)]=4`, then x= ______A. 24B. -10C. 24,-10D. 10

Answer» Correct Answer - C
` log_(a)x = b Rightarrow a^(b) =x`
(ii) Write ` sqrt( x^(2) - 14x + 49)= 16 + 1`
= 17 and solve for x.
(iii) Then verify for what values of x, logf(x) is defined.


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