Tính:

A = ( \(\dfrac{1}{4}\) - 1 )( \(\dfrac{1}{9}\) - 1 )( \(\dfrac{1}{16}\) - 1 )...( \(\dfrac{1}{100}\) - 1 )

B = ( \(\dfrac{1}{2}\) - 1 )( \(\dfrac{1}{3}\) - 1 )( \(\dfrac{1}{4}\) - 1 )...( \(\dfrac{1}{10}\) - 1 )

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