\(B=-\dfrac{2^{12}\cdot3^{10}+2^9\cdot2^3\cdot3^9\cdot3\cdot5}{2^{12}\cdot3^{12}+2^{11}\cdot3^{11}}\)
\(=-\dfrac{2^{12}\cdot3^{10}+2^{12}\cdot3^{10}\cdot5}{2^{11}\cdot3^{11}\cdot7}\)
\(=-\dfrac{2^{12}\cdot3^{10}\cdot6}{2^{11}\cdot3^{11}\cdot7}=-\dfrac{2^{13}\cdot3^{11}}{2^{11}\cdot3^{11}\cdot7}=\dfrac{-4}{7}\)
tinh gí tri bieu thuc:
D=\(\dfrac{4^6.9^5+6^9.120}{-8^4.3^{12}-6^{11}}\)
Tính \(\frac{4^6.9^5+6^9.120}{-8^4.3^{12}-6^{11}}\)
Tính
\(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
gia tri cua bieu thuc : B=\(\dfrac{-1:1\dfrac{1}{15}}{3\dfrac{1}{8}:6\dfrac{2}{3}}\): \(\dfrac{4\dfrac{7}{8}:13}{5:1\dfrac{7}{8}}\): \(\dfrac{1}{3^2}\)
Tính giá trị biểu thức:
B = \(\dfrac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}\)
Tim gia tri nho nhat cua bieu thuc : A=\(\dfrac{21\left|4x+6\right|+33}{3\left|4x+6\right|+5}\)
Tinh gia tri bieu thuc : (3.2^20+7.2^19).52/(13.8^4)^2
1/Rút gọn biểu thức
a/ B=\(\dfrac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
b/C= \(\dfrac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)
c/D=\(\dfrac{49^{24}.125^{10}.2^8-5^{30}.7^{49}.4^5}{5^{29}.16^2.7^{48}}\)
2/tìm x biết
a/9x+1-5.32x= 324
b/\(\dfrac{1}{3}\).3x=7.32.92-2.3x
c/\(\dfrac{1}{5}\).2x+\(\dfrac{1}{3}\).2x+1=\(\dfrac{1}{5}\).27+\(\dfrac{1}{3}\).28
d/ 3x+1+2x.3x- 18x - 27=0
Giups mik nhanh với, mai mik đi hc rùi 
, bạn nào làm đc mik tick cho
A = \(\frac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}\) _\(\frac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
