$\begin{array}{1 1} 10^3 \\ 10^4 \\ 10^5 \\ 10^6 \end{array}$

Want to ask us a question? Click here

Browse Questions

Ad |

0 votes

0 votes

- If $e\in Q^+$ is the identity element , then $a*e=a \:\:\forall\:a\in\: Q^+$
- If $a*b=b*a=e$, where e is the identity element of * then b is inverse of a and viceversa.

Let e be the identity element then

$a*e=a\:\Rightarrow \large\frac{ae}{100}=a$

$\Rightarrow e=100$

Let $x$ be the inverse element of 0.1

Then $ 0.1*x=100$ $\Rightarrow\:\large\frac{0.1x}{100}=$$100$

$\Rightarrow\:x={10}^5$

Ask Question

Take Test

x

JEE MAIN, CBSE, NEET Mobile and Tablet App

The ultimate mobile app to help you crack your examinations

...