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\(\left(5^2\times2^3-7^3\times2\right)\div2\times6-7\div2^5\)
\(=\left(25\times8-343\times2\right)\div2\times6-7\div32\)
\(=\left(200-686\right)\div2\times6-7\div32\)
\(=-486\div2\times6-7\div32\)
\(=-1458-0,21875\)
\(=-1458,21875\)
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\(\left(5^2.2^3-7^3.2\right):\left(2.6-7:2^5\right)\\ =\left(25.8-343.2\right):\left(12-7:32\right)\\ =\left(200-686\right):\left(12-\dfrac{7}{32}\right)\\ =-486:\dfrac{377}{32}=-486.\dfrac{32}{377}=-\dfrac{15552}{377}\)
(5^2*2^3-7^3*2):2*6-7:2^5
=(25*8-343*2):3-7/32
=-162-7/32=-5191/32
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\(36\cdot4-4\cdot\left[82-7\cdot11\right]^2:4-2016^0\)
=9-1-5^2
=8-25=-17
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a,183:93=(18-9)3=729
b,còn lại tự làm ,làm mẫu đến đây thôi
l.i.k.e cho mình nha Nguyen vu dang nguyen
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\(\left(5.2^2-20\right):\left(5+3^2:6\right)\\ =\left(5.4-20\right):\left(5+9:6\right)\\ =\left(20-20\right):\left(5+\dfrac{3}{2}\right)\\ =1:\dfrac{13}{2}=\dfrac{2}{13}\)
47 - mở ngoặc vuông mở ngoặc tròn 45 x 2 mũ 4 - 5 mũ 2 x 12 đóng ngoặc tròn chia 14 đóng ngoặc vuông
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707: [(2x -5) + 74] = 42 - 32
(2x -5) + 74 = 101
2x - 5 + 74 = 101
2x + 69 = 101
2x = 32 = 25
=> x = 5
707: [(2x -5) + 74] = 42 - 32
(2x -5) + 74 = 101
2x - 5 + 74 = 101
2x + 69 = 101
2x = 32 = 25
=> x = 5
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a)\(x^{15}=x\Rightarrow x\in\left\{0;1\right\}\) d)Là ý b
b)\(\left(2x+1\right)^3=125\\ \left(2x+1\right)^3=5^3\Rightarrow2x+1=5\\ 2x=4\\ x=2\) e)\(\left(x-3\right)^2=25\\ \Rightarrow\left(x-3\right)^2=5^2\\ \Rightarrow\hept{\begin{cases}x-3=5\Rightarrow x=8\\x-3=-5\Rightarrow x=-2\end{cases}}\)
c)\(\left(x-5\right)^4=\left(x-5\right)^6\\ \Rightarrow x-5\in\left\{0;1\right\}\Rightarrow x\in\left\{5;6\right\}\)
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\(3^2\left(x+4\right)-5^2=5.2^2\)
\(9\left(x+4\right)-25=5.4\)
\(9\left(x+4\right)-25=20\)
\(9\left(x+4\right)=20+25\)
\(9\left(x+4\right)=45\)
\(X+4=45:9\)
\(x+4=5\)
\(x=5-4\)
\(x=1\)
Vậy x=1