Question

Answer 1

B=(tiếp)1-1/3+1/3-1/5+...+1/99-1/101

=1-1/101

=100/101

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Answer 2

\(B=1-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{7}+...+\dfrac{1}{99}-\dfrac{1}{101}\\ B=1-\dfrac{1}{101}=\dfrac{100}{101}\)

Answer 3

100/101