page905      Subsets, cosets and Lagrange's theorem      Matthias Lorentzen...mattegrisenforlag.com

Look at the picture beneath, then scroll down to the question and click the correct Answer button.

`B^-1 = R`

×

Right answer

Close the window and click for the next page...

Close

• or

`B^-1 = B`

×

Wrong answer

Close the window and try once more...

Close

• Click here for the next page