Rationalization Method to Remove Indeterminate Form
limx→2√x-2+√x...
Question
limx→2√x−2+√x−√2√x2−4 is equal to?
A
12
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B
1
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C
2
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D
none of these
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Solution
The correct option is B12 limx→2(√x−2+√x−√2√x2−4)=limx→2(√x−2√x2−4+√x−√2√x2−4)=limx→2(1√x+2+√x−√2√x2−4)=12+limx→2(x−2√x+√2⋅1√x2−4)=12+limx→2(1√x+√2⋅√x−2x+2)=12 Hence, option 'A' is correct.