a) Đặt thừa số chung, kq = 61/9
b) áp dụng a^0 = 1 tính đc kq: -25/24.
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Các câu hỏi tương tự
tìm x biết
left(3dfrac{1}{2}+2xright).2dfrac{2}{3}5dfrac{1}{3}
dfrac{3}{4}-2.left|2x-dfrac{2}{3}right|2
left(0.6-dfrac{1}{2}right).dfrac{3}{4}-left(-1right)dfrac{1}{3}
left(3x-1right).left(-dfrac{1}{2}x+5right)0
dfrac{1}{4}+dfrac{1}{3}:left(2x-1right)-5
left(2x+dfrac{3}{5}right)^2-dfrac{9}{25}0
-5.left(x+dfrac{1}{5}right)-dfrac{1}{2}.left(x-dfrac{2}{3}right)dfrac{3}{2}x-dfrac{5}{6}
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tìm x biết
\(\left(3\dfrac{1}{2}+2x\right).2\dfrac{2}{3}=5\dfrac{1}{3}\)
\(\dfrac{3}{4}-2.\left|2x-\dfrac{2}{3}\right|=2\)
\(\left(0.6-\dfrac{1}{2}\right).\dfrac{3}{4}-\left(-1\right)=\dfrac{1}{3}\)
\(\left(3x-1\right).\left(-\dfrac{1}{2}x+5\right)=0\)
\(\dfrac{1}{4}+\dfrac{1}{3}:\left(2x-1\right)=-5\)
\(\left(2x+\dfrac{3}{5}\right)^2-\dfrac{9}{25}=0\)
\(-5.\left(x+\dfrac{1}{5}\right)-\dfrac{1}{2}.\left(x-\dfrac{2}{3}\right)=\dfrac{3}{2}x-\dfrac{5}{6}\)
tìm x biết
a) \(\dfrac{2x-3}{3}+-\dfrac{3}{2}=\dfrac{5-2x}{6}-\dfrac{1}{2}\)
b) \(\left(3x-\dfrac{1}{2}\right).\left(3-\dfrac{1}{2}x\right).\left(1+\dfrac{3}{4}:x\right)=0\)
c) \(\left(3-\dfrac{9}{10}-|x+2|\right):\left(\dfrac{19}{20}-1-\dfrac{2}{3}\right)+\dfrac{4}{5}=1\)
BT2: Tính nhanh
7) \(\left(-\dfrac{1}{2}\right)-\left(-\dfrac{3}{5}\right)+\left(-\dfrac{1}{9}\right)+\dfrac{1}{71}-\left(-\dfrac{2}{7}\right)+\dfrac{4}{35}-\dfrac{7}{18}\)
8)\(\left(3-\dfrac{1}{4}+\dfrac{2}{3}\right)-\left(5-\dfrac{1}{3}-\dfrac{6}{5}\right)-\left(6-\dfrac{7}{4}+\dfrac{3}{2}\right)\)
tìm x:
a)\(\left(x+\dfrac{1}{2}\right).\left(\dfrac{2}{3}-2x\right)=0\)
b) \(\left(x.6\dfrac{2}{7}+\dfrac{3}{7}\right).2\dfrac{1}{5}-\dfrac{3}{7}=-2\)
c) \(x.3\dfrac{1}{4}+\left(\dfrac{-7}{6}\right).x-1\dfrac{2}{3}=\dfrac{5}{12}\)
d) \(5\dfrac{8}{17}:x+\left(-\dfrac{4}{17}\right):x+3\dfrac{1}{7}:17\dfrac{1}{3}=\dfrac{4}{11}\)
left(2x-3right)left(6-2xright)0
dfrac{1}{3}x+dfrac{2}{5}left(x-1right)0
left(3x-1right)left(-dfrac{1}{2}x+5right)0
dfrac{x}{5}dfrac{2}{3}
dfrac{x}{3}-dfrac{1}{2}dfrac{1}{5}
dfrac{x}{5}-dfrac{1}{2}dfrac{6}{10}
dfrac{x+3}{15}dfrac{1}{3}
dfrac{x-12}{4}dfrac{1}{2}
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\(\left(2x-3\right)\left(6-2x\right)=0\)
\(\dfrac{1}{3}x+\dfrac{2}{5}\left(x-1\right)=0\)
\(\left(3x-1\right)\left(-\dfrac{1}{2}x+5\right)=0\)
\(\dfrac{x}{5}=\dfrac{2}{3}\)
\(\dfrac{x}{3}-\dfrac{1}{2}=\dfrac{1}{5}\)
\(\dfrac{x}{5}-\dfrac{1}{2}=\dfrac{6}{10}\)
\(\dfrac{x+3}{15}=\dfrac{1}{3}\)
\(\dfrac{x-12}{4}=\dfrac{1}{2}\)
Thu gọn:
A dfrac{2^4.3^3+2^3.3^4}{2^5.3^3-2^4.3^2} D dfrac{left(dfrac{1}{2}-dfrac{1}{3}right).left(dfrac{2}{3}-dfrac{3}{4}right)}{left(dfrac{1}{2}+dfrac{1}{3}right).left(dfrac{2}{3}+dfrac{3}{4}right)}
B dfrac{2^3-3^4-2^4.3^3}{2^5.3^4-2^6.3^3} E left(dfrac{1}{2}-dfrac{1}{3}-dfrac{3}{4}right).left(dfrac{2}{3}-dfrac{3}{4}+dfrac{5}{6}right)
C dfrac{dfrac{1}{2}-dfrac{1}{2}:dfrac{3}{4}-dfrac{3}{4}}{dfrac{2}{3}-dfrac{2}{3}:dfrac{5}{6}-dfrac{5}{6}}
Giúp...
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Thu gọn:
A = \(\dfrac{2^4.3^3+2^3.3^4}{2^5.3^3-2^4.3^2}\) D = \(\dfrac{\left(\dfrac{1}{2}-\dfrac{1}{3}\right).\left(\dfrac{2}{3}-\dfrac{3}{4}\right)}{\left(\dfrac{1}{2}+\dfrac{1}{3}\right).\left(\dfrac{2}{3}+\dfrac{3}{4}\right)}\)
B = \(\dfrac{2^3-3^4-2^4.3^3}{2^5.3^4-2^6.3^3}\) E = \(\left(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{3}{4}\right).\left(\dfrac{2}{3}-\dfrac{3}{4}+\dfrac{5}{6}\right)\)
C = \(\dfrac{\dfrac{1}{2}-\dfrac{1}{2}:\dfrac{3}{4}-\dfrac{3}{4}}{\dfrac{2}{3}-\dfrac{2}{3}:\dfrac{5}{6}-\dfrac{5}{6}}\)
Giúp mình với ! 10k nha
1)tìm x
a)dfrac{2}{3}x+dfrac{5}{7}dfrac{3}{10} b)dfrac{11}{12}-left(dfrac{2}{5}+xright)dfrac{2}{3} c)2cdotleft(2x-dfrac{1}{7}right)0 d)left(3-2xright)left(7x-dfrac{1}{8}right)0
2)xác định giá trị của để:
a)dfrac{x+3}{x-5}có giá trị âm b)left(x+dfrac{2}{3}right)cdotleft(x-2right)0
giúp mình !
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1)tìm x
a)\(\dfrac{2}{3}x+\dfrac{5}{7}=\dfrac{3}{10}\) b)\(\dfrac{11}{12}-\left(\dfrac{2}{5}+x\right)=\dfrac{2}{3}\) c)\(2\cdot\left(2x-\dfrac{1}{7}\right)=0\) d)\(\left(3-2x\right)\left(7x-\dfrac{1}{8}\right)=0\)
2)xác định giá trị của để:
a)\(\dfrac{x+3}{x-5}\)có giá trị âm b)\(\left(x+\dfrac{2}{3}\right)\cdot\left(x-2\right)>0\)
giúp mình !
a)\(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
b)\(\left(1+\dfrac{2}{3}-\dfrac{1}{4}\right)x\left(\dfrac{4}{5}-\dfrac{3}{4}\right)\)
c)\(2:\left(\dfrac{1}{2}-\dfrac{2}{3}\right)^2\)
d)\(\dfrac{6^3+3x6^2+3^3}{-13}\)
Tìm x,y biết:
a) \(-\dfrac{1}{2}\left(3-2x\right)-7=5-\dfrac{1}{3}\left(x-\dfrac{4}{5}\right)\)
b)\(\left(5-\dfrac{3x}{2}\right):-1\dfrac{3}{8}=-7\dfrac{1}{3}\)
c)\(\left(2+3x\right)^2+\left|3x+2y\right|=0\)