\(=\dfrac{2^{12}\cdot3^{10}+2^{12}\cdot3^{10}\cdot5}{-\left(2^{12}\cdot3^{12}+2^{11}\cdot3^{11}\right)}\)
\(=-\dfrac{2^{13}\cdot3^{11}}{2^{11}\cdot3^{11}\left(2\cdot3+1\right)}=\dfrac{-4}{7}\)
\(=\dfrac{2^{12}\cdot3^{10}+2^{12}\cdot3^{10}\cdot5}{-\left(2^{12}\cdot3^{12}+2^{11}\cdot3^{11}\right)}\)
\(=-\dfrac{2^{13}\cdot3^{11}}{2^{11}\cdot3^{11}\left(2\cdot3+1\right)}=\dfrac{-4}{7}\)
Tính giá trị của biểu thức(tính nhanh nếu có thể):
1)\(\frac{35.\left(27^{8^{ }}+2.9^{11}\right)}{15.\left(81^{6^{ }}-12.3^{19}\right)}\)
2)\(\frac{5.4^{15^{ }}.9^{9^{ }}-4.3^{20^{ }}.8^9}{^{ }5.2^{9^{ }}.6^{19^{ }}-7.2^{29^{ }}.27^6}\)
3)\(\frac{4^{6^{ }}.9^{5^{ }}+6^{9^{ }}.120}{-8^{4^{ }}.3^{12^{ }}-6^{11}}\)
Tính
C=\(\dfrac{2^{12}\cdot3^5-4^6\cdot9^2}{\left(2^2\cdot3^6\right)^6+8^4\cdot3^5}-\dfrac{5^{10}\cdot7^3-25^5\cdot49^2}{\left(125\cdot7\right)^3+5^9\cdot14^3}\)
Viết kết quả của các câu sau dưới dạng lũy thừa của một số nguyên tố
a) \(\dfrac{2^{14}.3^{12}}{6^{11}}\)
b) \(\dfrac{6^{18}}{9^9.8^5}\)
a ) 4 . 3^x-1 + 2 . 3^x+2 = 4 . 3^6 + 2 . 3^9
b ) 5^x+4 - 3 . 5^x+3 = 2 . 5^11
c ) 11 . 6^x-1 = 11 . 6^11 + 2 . 6^13
4^5 . 9^4 - 2 . 6^9 / 2^10 . 3^8 + 6^8 . 20
Rút gọn
a) \(\dfrac{2^{15}.9^4}{6^6.8^3}\)
b) \(\dfrac{45^{15}.5^{15}}{75^{15}}\)
c) \(\dfrac{8^{10}+4^{10}}{8^4+4^{11}}\)
d) \(\left(x^2\right)^5:\left(x^5\right)^2\)
Tìm x biết:
1)25/12x+11/15=9/10
2)3/2x-2/5=1/3x-1/4
3)29/12[x]-5/6=3/8
4)[4x+3/4]-5/4=2
5)2x+2x+3=144
Tính
\(\dfrac{-15}{8}-\dfrac{4}{9}+\dfrac{-1}{8}+\dfrac{-5}{7}+\dfrac{-5}{9}\)
\(\left(\dfrac{-3}{4}\right)^3-\left(\dfrac{1}{2}\right)^6+2\)
-6,25+ 2,475- 12,123
GIPUPS MÌNH NHA CÁC BẠN
1) Thực hiện phép tính
a) \(\dfrac{4^6x9^5+6^9x120}{-8^4x3^{12}-6^{11}}\)
b) \(\dfrac{1}{1-\dfrac{1}{1-2-1}}+\dfrac{1}{1+\dfrac{1}{1+2-1}}\)