MathRevolution wrote:
[GMAT math practice question]
If 0.010<x-√5<0.011, approximation of 1/√5-1/x is which of the following options?
A. 0.01
B. 0.002
C. 0.02
D. 0.003
E. 0.03
0.010<x-√5<0.011........ basically means x-√5~0....x~√5...
Let's see the equation now..
\(\frac{1}{√5}-\frac{1}{x}=\frac{x-√5}{x√5}=\frac{0.010}{√5*√5}=0.002\)
B
...
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