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A melhor resposta!
2014-06-26T02:18:49-03:00
 \sqrt{1-x/x+1}- \sqrt[4]{x}

1-x \geq 0
-x \geq -1
x \geq 1

x+1>o
x>-1
 ------------------------- 1+++++++
-------1++++++++++++++++++++
++++1--------------------++++++++
++++1                          1+++++++

resposta letra b) 1
1 5 1
2014-06-26T09:56:52-03:00