Question

[Nguyễn Thảo Hân]

Đơn giản biểu thức sau :

B= \(\frac{\frac{12}{13}+\frac{12}{1313}+\frac{12}{131}-\frac{12}{1313}}{\frac{15}{13}+\frac{15}{131}-\frac{15}{1313}+\frac{15}{1313}}\)

HELPME

Answer 1

[Phạm Bích Loan]

=>B=\(\frac{12.\left(\frac{1}{13}+\frac{1}{1313}+\frac{1}{131}+\frac{1}{1313}\right)}{15.\left(\frac{1}{13}+\frac{1}{1313}+\frac{1}{131}+\frac{1}{1313}\right)}\)

=>B=\(\frac{12}{15}\)

=>B=\(\frac{4}{5}\)

Answer 2

[Minh Hiền Trần]

B = \(\frac{12.\left(\frac{1}{13}+\frac{1}{1313}+\frac{1}{131}-\frac{1}{1313}\right)}{15.\left(\frac{1}{13}+\frac{1}{131}-\frac{1}{1313}+\frac{1}{1313}\right)}\)

=\(\frac{12.\left(\frac{1}{13}+\frac{1}{131}\right)}{15.\left(\frac{1}{13}+\frac{1}{131}\right)}\)

=\(\frac{12}{15}=\frac{4}{5}\)

Vậy B = 4/5.