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Find the domain of the function `f(x)`defined by `f(x)=sqrt(4-x)+1/(sqrt(x^2-1))`.A. `(-oo,-1)uu(1,4]`B. `(-oo,-1]uu(1,4]`C. `(-oo,-1)uu[1,4]`D. `(-oo,-1)uu[1,4)` |
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Answer» Correct Answer - A We have, `f(x)=sqrt(4-x)+(1)/(sqrt(x^(2)-1))` f(x) is defined, if `4-xge0orx^(2)-1gt0` `x-4le0 or (x-1)(x-1)gt0` `xle4 or xlt-1 and xgt1` `:.` Domain of `f=(-oo,-1)uu(1,4]` |
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