A = 1,4(51)-0,2(3)+0,7(81)
=479/330-7/30+43/55
=479/330-77/330+258/330
=2
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Tính:a)\(\left(\frac{1}{9}-1\right).\left(\frac{1}{10}-1\right)...\left(\frac{1}{2004}-1\right).\left(\frac{1}{2005}-1\right)\)
b)\(81^{10}-27^{13}-9^{21}⋮225\)
\(A=\frac{\left(0,4-\frac{2}{\sqrt{81}}+\frac{2}{11}\right)}{\left(1,4-\frac{7}{\sqrt{81}}+\frac{7}{11}\right)}\)
Tính:
\(\left(\dfrac{3}{4}-81\right).\left(\dfrac{3^2}{5}-81\right).\left(\dfrac{3^3}{6}-81\right).....\left(\dfrac{3^{2000}}{2003}-81\right)\)
Tính
a) \(\dfrac{13}{50}.\left(-15.5\right):\dfrac{13}{50}.84\dfrac{1}{2}\)
b) \(\dfrac{\left(-0,7\right)^2.\left(-5\right)^3}{\left(-2\dfrac{1}{3}\right)^3.\left(1\dfrac{1}{2}\right)^4.\left(-1\right)^5}\)
Tính: \(\left(\frac{3}{4}-81\right)\left(\frac{3^2}{5}-81\right)\left(\frac{3^3}{6}-81\right)...\left(\frac{3^{2000}}{2003}-81\right)\)
Tính:
\(\left(\frac{3}{4}-81\right).\left(\frac{3^2}{5}-81\right).\left(\frac{3^3}{6}-81\right)...\left(\frac{3^{2000}}{2003}-81\right)\)
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b)tìm x biết: \(\left(2x-1\right)^2=|-\frac{5}{4}-1|\)
Tính giá trị biểu thức:
\(\left(\frac{3}{4}-81\right)\left(\frac{3^2}{5}-81\right)\left(\frac{3^3}{6}-81\right).......\left(\frac{3^{2014}}{2014}-81\right)\)
Tính :
\(A=\left(\frac{3}{4}-81\right)\cdot\left(\frac{3^2}{5}-81\right)\cdot\left(\frac{3^3}{6}-81\right)\cdot.....\cdot\left(\frac{3^{2013}}{2016}-81\right)\)