JanuaryFrost
Question about function gof(x) and its domain, click to view



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JanuaryFrost
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\[f(x)=\sqrt{x}\] \[g(x)=\frac{ 1 }{ 5x ^{2} }\]

JanuaryFrost
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find gof(x) and determine the domain

chhanndresh
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\[gof(x) = 1/(5x)\]
and its domain is all real number except 5

JanuaryFrost
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not (0, 5)U(5,+infinity)?

JanuaryFrost
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because of the square root of x is involved, so i assumed it's x>or=0, and exclude 5

JanuaryFrost
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that's what im unsure of

chhanndresh
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same thing except you are working with only whole numbers and 0 and +infinity should be included so it like [0,5)U(5,+infiinty]

chhanndresh
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yes true we can only deal with positive numbers...

JanuaryFrost
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ok let's hope im right i wrote that down on my final exam today.

JanuaryFrost
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thank you