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1. Find the limit (1 + X twice) open radical + x x tends to infinity 2, find the limit ((X-2) open radical - root 2) / ((2x + 1) open radical - 3) x tends to infinity 4
1. If x tends to be positive infinity and any number + infinity = infinity, then the result is infinite
If x tends to negative infinity, then √ (1 + x ^ 2) + x = 0
2、lim（√（x-2）-√2）/（√（2x+1）-3）
x→4
The limit of numerator and denominator is 0, and the law of lobida is used
Derivation of molecular denominator ((X-2) ^ (- 1 / 2)) / 2 (2x + 1) ^ (- 1 / 2)
Substituting 4 into the limit is 3 √ 2 / 2
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