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Domain of the function, `f(x)=[log_10 ((5x-x^2)/4)]^(1/2)` isA. `-oo lt x lt oo`B. `1 le x le 4 `C. `4 le x le 16`D. ` -1 le x le 1` |
Answer» Correct Answer - B We have `f(x)=[log_(10)((5x-x^(2))/(4))]^(1//2) " (1)" ` From (1), clearly, `f(x)` is defined for those values of `x` for which `log_(10)[(5x-x^(2))/(4)] ge 0` or `((5x-x^(2))/(4)) ge 10^(0)` or `((5x-x^(2))/(4)) ge 1` or `x^(2)-5x+4 le 0` or `(x-1)(x-4) le 0` Hence, the domain of the function is [1, 4]. |
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