\(\dfrac{6^3+3\cdot6^2+3^5}{-13}=\dfrac{3^3\cdot2^3+3\cdot2^2\cdot3^2+3^5}{-13}\)
\(=\dfrac{3^3\left(2^3+2^2+3^2\right)}{-13}=\dfrac{3^3\cdot21}{-13}=\dfrac{-567}{13}\)
Tính
\(\frac{6^3+3.6^2+3^3}{-13}\)
1. Tình giá trị các biểu thức 1 cách hợp lí
A= ( 1/2 - 1) x (1/3 - 1) x (1/4 -1) ........ (1/1012 - 1)
B= 162. ( 1/3 - 1/5 + 1/7 trên 5/3 - 1 + 5/7 ) + ( 1 + 4/5 - 2/3 trên 5/4 + 1 - 5/6) x 818181/797979
2. Tìm x biết
a/ ( x + 3 ) / 5 = 5/7
b. // x - 5 / -4 / = 5
c/ ( -4/3 ) 3x + 1 = 256/81
d/ 3x2 - 133 : 338 = 0,25
e/ ( 0,4x - 2 ) - ( 1,5x = 1 ) + ( 4x + 0.8 ) = 3.6
Bài 1 :
a) \(\dfrac{4^5.4^2}{16^4}\)
b) \(\dfrac{2^8.9^4}{6^6.8^3}\)
c) \(\dfrac{6^3+3.6^2+3^3}{-13}\)
d) \(E=\dfrac{1}{3}+\left(\dfrac{+1}{3}\right)^2+\left(\dfrac{1}{3}\right)^3+...+\left(\dfrac{1}{3}\right)^{100}\)
e) \(\dfrac{\left(0,9\right)^7}{\left(0,3\right)^8}\)
1) Viết kết quả dưới dạng một lũy thừa
a)\(4^{13}.5^{26}\)
b)\(27^{15}:9^{10}\)
c)\(\left(0,125\right)^3.512\)
d)\(9^{20}:\left(0,375\right)^{40}\)
e)\(81.2^8\)
2)Tính
a)\(\left(\dfrac{1}{2}\right)^3.\left(\dfrac{2}{3}\right)^2\)
b)\(7^{2015}.\left(\dfrac{1}{4}\right)^{2014}\)
c)\(\left(\dfrac{1}{2}\right)^3:\left(\dfrac{1}{2}\right)^6\)
d)\(\dfrac{4^2.4^3}{2^{10}}\)
e)\(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
f)\(\dfrac{3^3.\left(0,5\right)^5}{1,5^4}\)
g)\(\dfrac{2^7.9^3}{6^5.8^2}\)
i)\(\dfrac{6^3+3.6^2.3^3}{-13}\)
k)\(2:\left(\dfrac{1}{2}-\dfrac{2}{3}\right)^3\)
l)\(0,5^5.32\)
m)\(\left(-0,125\right)^5.80^5\)
n)\(\left(0,25\right)^3.64\)
o)\(\left(-0,02\right)^5.\left(0,01\right)^5\)
3)Tìm giá trị của x sao cho
a)\(x^2=3^2\)
b)\(x^3=2^3\)
c)\(x^4=16\)
Help me tối nay1/8 18h mik đi hc rồi
8) \(\dfrac{17}{-26}.\left(\dfrac{1}{6}-\dfrac{5}{3}\right):\dfrac{17}{13}-\dfrac{20}{3}.\left(\dfrac{2}{5}-\dfrac{1}{4}\right)+\dfrac{2}{3}.\left(\dfrac{6}{5}-\dfrac{9}{2}\right)\)
Tính :
A = \(\dfrac{\dfrac{3}{7}-\dfrac{3}{11}+\dfrac{3}{13}}{\dfrac{5}{7}-\dfrac{5}{11}+\dfrac{5}{13}}+\dfrac{\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}}{\dfrac{5}{4}-\dfrac{5}{6}+\dfrac{5}{3}}\)
Bài 1:Tính giá trị của các biểu thức sau :
a. 4^5 . 9^4 - 2 . 6^9 / 2^10 . 3^8 + 6^8 .20
b. 6^3 + 3 .6^2 + 3^2/ -13
Tính : A=\(\frac{\frac{3}{4}-\frac{3}{11}+\frac{3}{13}}{\frac{5}{7}-\frac{5}{11}+\frac{5}{13}}+\frac{\frac{1}{2}-\frac{1}{3}+\frac{1}{4}}{\frac{5}{4}-\frac{5}{6}+\frac{5}{8}}\)
Tính biểu thức A=\(\dfrac{\dfrac{3}{4}-\dfrac{3}{11}+\dfrac{3}{13}}{\dfrac{5}{7}-\dfrac{5}{11}+\dfrac{5}{13}}+\dfrac{\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{4}}{\dfrac{5}{4}-\dfrac{5}{6}+\dfrac{5}{8}}\)
