a)A=\(\frac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}\)                b)B=\(\frac{45}{19}-\left(\frac{1}{2}\left(\frac{1}{3}+\left(\frac{1}{4}\right)^{-1}\right)^-\right)^{-1}\)     c)C=\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^{10}.6^{19}-7.2^{29}.27^6}\)

d)D=\(\frac{2^{21}.3^5-4^6.81}{\left(2^2.3\right)^6+8^4.3^5}\)                e) E=\(\left(6^9.2^{10}+12^{10}\right):\left(2^{19}.27^3+15.4^9.9^4\right)\)

f) F=\(\frac{3^6.45^4-15^{13}.5^{-9}}{27^4.24^3+45^6}\)          g)G=\(\frac{\left(\frac{2}{5}\right)^7.5^7+\left(\frac{9}{4}\right)^3:\left(\frac{3}{16}\right)^3}{2^7.5^2+512}\)         h)H=\(x+\frac{0,2-0,375+\frac{5}{11}}{-0,3+\frac{9}{16}-\frac{15}{22}}\)với x=-1/3

Các bạn ơi ,giúp mình với

Bài 1:Rút gọn

a)\(\frac{2^{19}\times27^3+15\times4^9\times9^4}{6^9\times2^{10}+12^{10}}\)

b)\(\frac{\left(\frac{-1}{2}\right)^3-\left(\frac{3}{4}\right)^3\times\left(-2\right)^2}{2\times\left(-1\right)^5+\left(\frac{3}{4}\right)^2-\frac{3}{8}}\)

c)\(\frac{45\times9^4-2\times6^4}{2^{19}\times3^8+6^8\times20}\)

Bài 2:Tìm x

a)\(5^x+5^{x+2}=650\)

b)\(3^{x-1}+5\times3=162\)

Tìm x, biết:

a) 60%x + 0,4x + x :3 =2      

b)1-\(\left(5\frac{3}{8}+x-7\frac{5}{24}\right):\left(-16\frac{2}{3}\right)\)

c)\(3\frac{1}{4}x-\frac{7}{6}x=\frac{-5}{12}+1\frac{2}{3}\)

Bài 2: Tính:

a) A= \(\frac{-45.58-45.42}{2+4+6+...+16+18}\)

b)1-2-3+4+5-6-7+...+601-602-603+604

b) \(\frac{\left(140\frac{3}{7}-138\frac{5}{12}\right):18\frac{1}{6}}{0,002}\)

Bài 3: Cho A và B, biết:

A=\(\frac{2^{19}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)            và B= \(\frac{4}{35}+\frac{4}{63}+\frac{4}{99}+\frac{4}{143}+\frac{4}{195}\)

Hãy so sánh A & B

bài 1 : tính hợp lí 

a) \( \left(-0,125\right)^3.80^4\)

b) \(\frac{81^{11}.3^{17}}{27^{10}.9^{15}}\)

bài 2 : rút gọn

a) \(A=\frac{16^3.3^{10}+120.6^9}{4^6.3^{12}+6^{11}}\)

b)\(B=\left(6^9.2^{10}+12^{10}\right):\left(2^{19}.27^3+15.4^9.9^4\right)\)

c)\(H=x+\frac{0,2-0,375+\frac{5}{11}}{-0,3+\frac{9}{16}-\frac{15}{22}}vs,x=-\frac{1}{3}\)

Bài 1 thực hiện phép tính 

a)\(\frac{45}{19}-\left(\frac{1}{2}+\left(\frac{1}{3}+\left(\frac{1}{4}\right)^{-1}\right)^{-1}\right)^{-1}.\)

b) \(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^{10}.6^{19}-7.2^{29}.27^6}.\)

Bài 2. tìm x, biết:

 a) 2(x-1) - 3(2x+2) - 4(2x+3) =16

 b) \(3\frac{1}{2}:\left|2x-1\right|=\frac{21}{22}\)

 c)  |x²+|x-1|| = x²+2

Bài 3. Chứng minh rằng số có dạng abcabc luôn chia hết cho 11

Bài 4.tính:

a)   A = \(\left(\frac{0,4-\frac{2}{9}+\frac{2}{11}}{1,4-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-0,25+\frac{1}{5}}{1\frac{1}{6}-0,875+0,7}\right):\frac{2012}{2013}\)

b)   B =\(4.\left(-\frac{1}{2}\right)^2-2.\left(-\frac{1}{2}\right)^2+3.\left(-\frac{1}{2}\right)+1\)

c)   C =\(\frac{1}{2}:\left(-1\frac{1}{2}\right):1\frac{1}{3}:\left(-1\frac{1}{4}\right):1\frac{1}{5}:\left(-1\frac{1}{6}\right):...:\left(-1\frac{1}{100}\right)\)

d)   D =\(\frac{4^6.9^5+6^9.120}{-8^4.3^{12}+6^{11}}\)

bài1: tìm x:

a)\(8< 2^x< =2^9.2^5\)

b)\(27< 81^3:3^x< 243\)

c)\(\left(\frac{2}{5}\right)^x\left(\frac{5}{2}\right)^{-3}.\left(\frac{-2}{5}\right)^2\)

d)\(\left(5x+1\right)^2=\frac{36}{49}\)

e)\(\left(x-\frac{2}{9}\right)^3=\left(\frac{2}{3}\right)^6\)                                f)\(\left(8x-1\right)^{2n+1}=5^{2n+1}\)(n thuộc N)

bài 2:tìm x,y biết:

a)\(x^2+\left(y-\frac{1}{10}\right)^4=0\)

b)\(\left(\frac{1}{2}x-5\right)^{20}+\left(y^2-\frac{1}{4}\right)^{10}< =6\)

c)\(\left(x-7\right)^{x+1}-\left(x-y\right)^{x+11}=0\)

bài 3:tìm giá trị nhỏ nhất:

\(A=\left(2x+\frac{1}{3}\right)^2-1\)

tìm Gía trị lớn nhất :\(B=-\left(\frac{4}{9}x-\frac{2}{15}\right)^6+3\)

baif4: tìm x,y:

\(x.\left(x-y\right)=\frac{1}{10}\)                                         \(\)

giúp mình với nhé