MHB Math Trick: How to Turn 1/25 Into 10 - Step by Step Guide

[Teh]

View attachment 6106
How it possible for 1/25 to become 10? May anyone show me the steps please

 

[Euge]

Hi Teh,

It's not that $1/25$ became $10$, but that $f(1/25) = 10$. For since $f(x) = 2/\sqrt{x}$ and $\sqrt{1/25} = 1/5$, then $f(1/25) = 2/(1/5) = 2 \cdot 5 = 10$.

 

[kaliprasad]

How it possible for 1/25 to become 10? May anyone show me the steps please

$\frac{1}{25}$ does not become 10

but $f(\frac{1}{25}) = \frac{2}{\sqrt{\frac{1}{25}}} = \frac{2}{\frac{1}{5}} = 2 * 5 =10 $

 

[Teh]

ahhh okay plug it into the square root of x thank you very much :D