Toán A=( 50 – 4/13 + 2/15 – 2/17 ) / ( 100 – 8/13 + 4/15 – 4/17 ) 05/09/2021 By Natalia A=( 50 – 4/13 + 2/15 – 2/17 ) / ( 100 – 8/13 + 4/15 – 4/17 )
$\dfrac{50-\dfrac{4}{13}+\dfrac{2}{15}-\dfrac{2}{17}}{100-\dfrac{8}{13}+\dfrac{4}{15}-\dfrac{4}{17}}\\=\dfrac{\dfrac{165750-1020+442-390}{3315}}{\dfrac{331500-2040+884-780}{3315}}\\=\dfrac{164782}{3315}=\dfrac{164782}{329564}=\dfrac{1}{2}$ Trả lời
$\dfrac{50-\dfrac{4}{13}+\dfrac{2}{15}-\dfrac{2}{17}}{100-\dfrac{8}{13}+\dfrac{4}{15}-\dfrac{4}{17}}\\=\dfrac{\dfrac{165750-1020+442-390}{3315}}{\dfrac{331500-2040+884-780}{3315}}\\=\dfrac{164782}{3315}=\dfrac{164782}{329564}=\dfrac{1}{2}$
Đáp án:
A = 1/2
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