B=\(\frac{1}{16}+\frac{6}{16\cdot26}+\frac{6}{26\cdot36}+\frac{6}{36\cdot46}+..........+\frac{6}{2006\cdot2016}\)
Trả lời: B=
\(y=\frac{\frac{15}{6\cdot16}+\frac{15}{16\cdot26}+\frac{15}{26\cdot36}}{\frac{33}{6\cdot16}-\frac{63}{16\cdot26}+\frac{93}{26\cdot36}}\)
các bạn tính kết quả giùm mình với ai trả lời sớm nhất mình sẽ like
Tính
\(\frac{\frac{15}{6\cdot16}+\frac{15}{16\cdot26}+\frac{15}{26\cdot36}}{\frac{33}{6\cdot16}-\frac{63}{16\cdot26}+\frac{93}{26\cdot36}}\)
Bạn ơi, nếu tính bằng máy tính thì kết quả là 5/7 và bâyh mình đang cần cách giải bạn ạ
A=\(\frac{\frac{15}{6\cdot16}+\frac{15}{16\cdot26}\frac{15}{26\cdot36}}{\frac{33}{6\cdot16}-\frac{63}{16\cdot26}+\frac{93}{26\cdot36}}\)
\(A=\frac{15}{\frac{6\cdot16}{\frac{33}{6\cdot16}}}+\frac{15}{\frac{\frac{16\cdot26}{63}}{16\cdot26}}+\frac{15}{\frac{26\cdot36}{\frac{93}{26\cdot36}}}\) = ?
\(\frac{\frac{15}{6\cdot16}+\frac{15}{16\cdot26}+\frac{15}{26\cdot36}}{\frac{33}{6\cdot16}-\frac{63}{16\cdot26}+\frac{93}{26\cdot36}}\) tính nhẩm
Tính
\(A=\frac{\frac{15}{6\cdot16}+\frac{15}{16\cdot26}+\frac{15}{26\cdot36}}{\frac{33}{6\cdot16}-\frac{63}{16\cdot26}+\frac{93}{26\cdot36}}\)
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Tính:
a)\(\frac{5\cdot18-10\cdot27+15\cdot36}{10\cdot36-20\cdot54+30\cdot27}\)
b)\(\frac{\frac{-6}{7}+\frac{6}{19}-\frac{6}{31}}{\frac{9}{7}-\frac{9}{19}+\frac{9}{31}}\)
\(\frac{5.18-10.27+15.36}{10.36-20.54+30.72\left(not27\right)}=\frac{5.18-10.27+15.36}{4\left(5.18-10.27+15.36\right)}=\frac{1}{4}\)
\(\frac{\frac{-6}{7}+\frac{6}{19}-\frac{6}{31}}{\frac{9}{7}-\frac{9}{19}+\frac{9}{31}}=\frac{-6\left(\frac{1}{7}-\frac{1}{19}+\frac{1}{31}\right)}{9\left(\frac{1}{7}-\frac{1}{19}+\frac{1}{31}\right)}=\frac{-6}{9}=\frac{-2}{3}\)
Tính D=\(\frac{\frac{15}{6\times16}+\frac{15}{16\times26}+\frac{15}{26\times36}}{\frac{33}{6\times16}-\frac{63}{16\times26}+\frac{93}{26\times36}}\)
Ta có: \(D=\frac{\frac{15}{6x16}+\frac{15}{16x26}+\frac{15}{26x36}}{\frac{33}{6x16}-\frac{63}{16x26}+\frac{93}{26x36}}\)
\(\Rightarrow D=\frac{15.\frac{1}{6x16}+15.\frac{1}{16x26}+15.\frac{1}{26x36}}{3.11.\frac{1}{6x16}-3.21.\frac{1}{16x26}+3.31.\frac{1}{26x36}}\)
\(\Rightarrow D=\frac{15.\left(\frac{1}{6x16}+\frac{1}{16x26}+\frac{1}{26x36}\right)}{3.\left(\frac{11}{6x16}-\frac{21}{16x26}+\frac{31}{26x36}\right)}\)
\(\Rightarrow D=5.\left(\frac{1}{6x16}+\frac{1}{16x26}+\frac{1}{26x36}\right):\left(\frac{11}{6x16}-\frac{21}{16x26}+\frac{31}{26x36}\right)\)
Tính giá trị của biểu thức
a. B= \(\frac{1}{16}\)+\(\frac{6}{16.26}\)+\(\frac{6}{26.36}\)+.....+\(\frac{6}{2006}\)