\(\left(-3\right)^{11}.\left(x+2\right)=9^6\)
\(\left(-3\right)^{11}.\left(x+2\right)=\left(-3\right)^{12}\)
\(x+2=\left(-3\right)^{12}:\left(-3\right)^{11}=-3\)
\(x=-3-2=-5\)
Tính:
\(\left(-2\frac{1}{5}\right)\times\left(\frac{-9}{11}\right)\times\left(-1\frac{1}{14}\right)\times\frac{2}{5}+\left(\frac{-4}{7}+\frac{6}{11}\right)\div\)\(\frac{-3}{5}\)
1.Thực hiện phép tính:(hepl me)
a)\(4\frac{5}{9}:\left(\frac{-5}{7}\right)+\frac{49}{9}:\left(\frac{-5}{7}\right)\)
b)\(\left(\frac{-3}{5}+\frac{4}{9}\right):\frac{7}{11}+\left(\frac{-2}{5}+\frac{5}{9}\right):\frac{7}{11}\)
c)\(\left(\frac{3}{4}\right)^4\times\left(\frac{8}{9}\right)^2\)
d)\(\left(\frac{-3}{5}\right)^6\times\left(-\frac{5}{3}\right)^5\)
e)\(\frac{8^{14}}{4^4\times64^5}\)
f)\(\frac{9^{10}\times27^7}{81^7\times3^{15}}\)
\(\dfrac{4^{10}\times9^6+3^{12}\times8^5}{6^{13}\times4-2^{16}\times3^{12}}\)
\(\dfrac{2^4\times2^6}{\left(2^5\right)^2}-\dfrac{2^5\times15^3}{6^3\times10^2}\)
\(\dfrac{\left(-2\right)^{10}\times3^{31}+2^{40}\times\left(-3\right)^6}{\left(-2\right)^{11}\times\left(-3\right)^{31}+2^{41}\times3^6}\)
giải chi tiết giúp mình nhé
Thu gọn biểu thức
a) \(C=\frac{7}{9}x^3y^2\left(\frac{6}{11}axy^3\right)+\left(-5bx^2y^4\right)\left(\frac{-1}{2}axz\right)+ax\left(x^2y\right)^3\)
b)\(D=\frac{\left(3x^4y^4\right)^2\left(\frac{6}{11}x^3y\right)\left(8x^{n-7}\right)\left(-2x^{7-n}\right)}{15x^3y^2\left(0,4ax^2y^2z^2\right)^2}\)(với axyz khác 0)
Thu gọn các đơn thức trong biểu thức đại số.
a) \(C=\frac{7}{9}x^3y^2.\left(\frac{6}{11}axy^3\right)+\left(-5bx^2y^4\right).\left(\frac{-1}{2}axz\right)+ax\left(x^2y\right)^3\)
b) \(D=\frac{\left(3x^4y^3\right)^2.\left(\frac{1}{6}x^2y\right)+\left(8x^{n-9}\right).\left(-2x^{9-n}\right)}{15x^3y^2\left(0,4ax^2y^2z^2\right)}\)
Bài 1:So sánh
\(5^{1000}\)và\(3^{1500}\)
Bài 2:Tính
\(\frac{\left(3^3\right)^2\times\left(2^3\right)^5}{\left(2\times3\right)^6\times\left(2^5\right)^3}\)
Bài 3:Chứng minh rằng
a)\(7^6+7^5-7^4\)chia hết cho 11
b)\(81^7-27^9-9^{13}\)chia hết cho 45
Tìm x:
\(\frac{0,1\left(6\right)+0,\left(3\right)}{0,\left(3\right)+1,1\left(6\right)}\times x=0,\left(2\right)\)
Thu gọn các đơn thức trong biểu thức đại số sau:
C = \(\dfrac{7}{9}x^3y^2.\dfrac{6}{11}axy^3+-5bx^2y^4.-\dfrac{1}{2}axz+ax.\left(x^2y\right)^3\)
D = \(\dfrac{\left(3x4y^3\right)^2.\left(\dfrac{1}{6}x^2y\right)+\left(8x^{n-9}\right).\left(-2x^{9-n}\right)}{15x^3y^2\left(0,4ax^2y^2z^2\right)}\) ( với axyz khác 0)
\(\frac{8}{9}-\left(\frac{-1}{3}\right)^2+\left(\frac{5}{6}\right)^{2020}\times\left(\frac{6}{5}\right)^{2020}\)
