4 tháng 9 2015 lúc 13:44
Các câu hỏi tương tự
3,2.frac{15}{16}-left(75%+frac{2}{7}right):left(-1frac{1}{28}right)left(0,25+12,5-frac{5}{16}right):left[12-frac{7}{12}:left(frac{3}{8}-frac{1}{12}right)right]left(frac{-3}{5}+frac{5}{11}right):frac{-3}{7}+left(frac{-2}{5}+frac{6}{5}right):frac{-3}{7}14,5-frac{8}{9}:left(35-34frac{8}{9}right).frac{9}{8}1frac{1}{15}-left(frac{1}{15}+frac{4}{9}:frac{-2}{3}-frac{28}{16}.frac{6}{35}right)-frac{3}{10}Tìm x left(4,5-2xright)left(-3frac{2}{3}right)frac{11}{15}backslash34-xbackslashleft(-3right)^4left(4...
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\(3,2.\frac{15}{16}-\left(75\%+\frac{2}{7}\right):\left(-1\frac{1}{28}\right)\)
\(\left(0,25+12,5-\frac{5}{16}\right):\left[12-\frac{7}{12}:\left(\frac{3}{8}-\frac{1}{12}\right)\right]\)
\(\left(\frac{-3}{5}+\frac{5}{11}\right):\frac{-3}{7}+\left(\frac{-2}{5}+\frac{6}{5}\right):\frac{-3}{7}\)
\(14,5-\frac{8}{9}:\left(35-34\frac{8}{9}\right).\frac{9}{8}\)
\(1\frac{1}{15}-\left(\frac{1}{15}+\frac{4}{9}:\frac{-2}{3}-\frac{28}{16}.\frac{6}{35}\right)-\frac{3}{10}\)
Tìm x
\(\left(4,5-2x\right)\left(-3\frac{2}{3}\right)=\frac{11}{15}\)
\(\backslash34-x\backslash=\left(-3\right)^4\)
\(\left(4x^2-1\right)\left(\text{\x}\backslash-\frac{2}{3}\right)=0\)
\(\frac{3}{5}x-\frac{1}{2}\)\(x=\frac{-7}{20}\)
So sánh A và B , biết rằng:Asqrt[13]{12timesleft(11-frac{frac{left(10times8right)^{left(9+8right)}}{8}+frac{6^7times6-6}{6}}{frac{5}{4}}right)div3+2}Bsqrt[13]{12divleft(11+frac{frac{left(10times8right)^{left(9-8right)}}{8}+frac{6^7times6+6}{6}}{frac{5}{4}}right)times3-2}
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So sánh \(A\) và \(B\) , biết rằng:
\(A=\sqrt[13]{12\times\left(11-\frac{\frac{\left(10\times8\right)^{\left(9+8\right)}}{8}+\frac{6^7\times6-6}{6}}{\frac{5}{4}}\right)\div3+2}\)
\(B=\sqrt[13]{12\div\left(11+\frac{\frac{\left(10\times8\right)^{\left(9-8\right)}}{8}+\frac{6^7\times6+6}{6}}{\frac{5}{4}}\right)\times3-2}\)
Tính hợp lý :
\(\left(5-\frac{43}{10}\right)-\left(\frac{42}{19}-\left(\frac{7}{2}-\frac{59}{10}\right)\right)+\frac{42}{19}+\frac{59}{10}+\frac{4}{5}\)
Thực hiện phép tính :a, sqrt{12frac{1}{4}}.left(-frac{2}{7}right)^2-left[2,left(4right).2frac{5}{11}right]:(-frac{42}{5})b, left(1-frac{1}{2}right).left(1-frac{1}{3}right).left(1-frac{1}{4}right)...left(1-frac{1}{2007}right)c, frac{0,375-0,3+frac{3}{11}+frac{3}{12}}{-0,625+0,5-frac{5}{11}-frac{5}{12}}+frac{1,5+1-0,75}{2,5+frac{5}{3}-1,25}Các bạn giải nhanh giúp mình nha!
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Thực hiện phép tính :
a, \(\sqrt{12\frac{1}{4}}.\left(-\frac{2}{7}\right)^2-\left[2,\left(4\right).2\frac{5}{11}\right]:(-\frac{42}{5})\)
b, \(\left(1-\frac{1}{2}\right).\left(1-\frac{1}{3}\right).\left(1-\frac{1}{4}\right)...\left(1-\frac{1}{2007}\right)\)
c, \(\frac{0,375-0,3+\frac{3}{11}+\frac{3}{12}}{-0,625+0,5-\frac{5}{11}-\frac{5}{12}}+\frac{1,5+1-0,75}{2,5+\frac{5}{3}-1,25}\)
Các bạn giải nhanh giúp mình nha!
1/ So sánh A=\(\frac{1}{41}+\frac{1}{42}+\frac{1}{43}+...+\frac{1}{80}\)và B=\(\frac{7}{12}\)
Vậy A...B
2/ Giá trị của x thỏa mãn:
Ix2+Ix-1II=x2
3/ \(\frac{\left(-\frac{1}{2}\right)^n}{\left(-\frac{1}{2}\right)^{n+2}}\). Tìm giá trị n=?
\(\frac{-9}{12}-\left(\frac{-35}{42}\right)\)
Bài 1 : cho 2 biểu thứcAleft(1-frac{1}{2}right)left(1-frac{1}{3}right)...left(1-frac{1}{19}right)left(1-frac{1}{20}right)Bleft(1-frac{1}{4}right)left(1-frac{1}{9}right)left(1-frac{1}{16}right)...left(1-frac{1}{81}right)left(1-frac{1}{100}right)So sánh A với frac{1}{21}So sánh B với frac{11}{21}
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Bài 1 : cho 2 biểu thức
\(A=\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)...\left(1-\frac{1}{19}\right)\left(1-\frac{1}{20}\right)\)
\(B=\left(1-\frac{1}{4}\right)\left(1-\frac{1}{9}\right)\left(1-\frac{1}{16}\right)...\left(1-\frac{1}{81}\right)\left(1-\frac{1}{100}\right)\)
So sánh A với \(\frac{1}{21}\)
So sánh B với \(\frac{11}{21}\)
So sánh các tích sau bằng cách hợp lí:
\(P_1=\left(-\frac{57}{95}\right).\left(-\frac{29}{60}\right);\) \(P_2=\left(-\frac{5}{11}\right).\left(-\frac{49}{73}\right).\left(-\frac{6}{23}\right)\)
\(P_3=\frac{-4}{11}.\frac{-3}{11}.\frac{-2}{11}.....\frac{3}{11}.\frac{4}{11}\)
So sánh
\(\left(\frac{-1}{4}\right)^{40}\)và \(\left(\frac{-1}{5}\right)^{34}\)
Giúp với nào