a: \(=\left(0.2\right)^5\cdot25^5\cdot0.04\)
\(=5^5\cdot0.04=125\)
b: \(=4^5\cdot\left(0.25\right)^7\)
\(=4^5\cdot\left(0.25\right)^5\cdot\left(0.25\right)^2=0.0625\)
c: \(=4^3\cdot0.25^3\cdot0.25=0.25\)
Rút gọn
C = \(\frac{\left(\frac{2}{5}\right)^7.5^7+\left(\frac{9}{4}\right)^3:\left(\frac{3}{16}\right)^3}{2^7.5^2+512}\)
D = \(\frac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}\)
E = \(\frac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
Tính : \(\dfrac{\left(\dfrac{2}{5}\right)^7.5^7+\left(\dfrac{9}{4}\right)^3:\left(\dfrac{3}{16}\right)^3}{2^7.5^2+512}\)
Rút gọn
C = \(\frac{\left(\frac{2}{5}\right)^7.5^7+\left(\frac{9}{4}\right)^3:\left(\frac{3}{16}\right)^3}{2^7.5^2+512}\)
Tính
a. \(\frac{\left(13\frac{1}{4}-2\frac{5}{7}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{10}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
Tính \(P=\dfrac{1}{0,25}.\left(1\dfrac{1}{4}\right)^2+25.\left[\dfrac{1}{\left(\dfrac{4}{3}\right)^2}:\left(\dfrac{5}{4}\right)^3\right]:\dfrac{1}{\left(-\dfrac{2}{3}\right)^3}\)
Bài 1: Tính:
\(a,\left(0,25\right)^3.32\) \(b,\left(0,125\right)^3.512\) \(c,\dfrac{8^2.4^5}{2^{20}}\) \(d,\dfrac{81^{11}.3^{17}}{27^{10}.9^{15}}\)
Bài 2: Tìm giá trị nhỏ nhất của các biểu thức sau:
\(a,A=\left|x-\dfrac{3}{4}\right|\) \(b,B=1,5+\left|2-x\right|\) \(c,A=\left|2x-\dfrac{1}{3}\right|+107\) \(d,M=5\left|1-4x\right|-1\)
Bài 3: Tìm giá trị lớn nhất của biểu thức sau:
\(a,C=-\left|x-2\right|\) \(b,D=1-\left|2x-3\right|\) \(c,D=-\left|x+\dfrac{5}{2}\right|\)
(mn giải giúp mk với, thanks mn nhìu!)
1. \(25\dfrac{1}{7}:\left(-\dfrac{5}{7}\right)-15\dfrac{1}{7}:\left(-\dfrac{5}{7}\right)+\dfrac{4}{5}\) 3. \(2\dfrac{2}{3}:\left\{\left[\left(3,72-0.02\right)\dfrac{10}{37}\right]:\dfrac{5}{6}+2,8\right\}-\dfrac{7}{15}\)
2. \(\left(3+\dfrac{4}{5}-\dfrac{5}{12}\right)\left(\dfrac{6}{7}-\dfrac{3}{5}\right)^2\)
4.23+3.\(\left(-\dfrac{1}{2}\right)^2\)-22.4+\(\left[\left(-2\right)^2:\dfrac{1}{2}\right]\)
\(\dfrac{\left(-0,25\right)^{-5}.9^4\left(-2\right)^{-3}-2^{-3}.6^9}{2^9.3^6+6^6.40}\)
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
