Ta có:

\(\frac{2^3.3^4}{2^2.3^2.5}=\frac{2.3^2}{5}=\frac{18}{5}\)

\(\frac{2^4.5^2.11^2.7}{2^3.5^3.7^2.11}=\frac{2.11}{5.7}=\frac{22}{35}\)

\(2020\text{×}\text{45+2022\text{×}54+2022 }\)

=202110 nhé

ko

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A.\(\frac{2^3.9^2}{2^2.3^2.5}=\frac{2^2.2.\left(3^2\right)^2}{2^2.3^2.5}=\frac{2.3^2}{5}=\frac{18}{5}\)

B.\(\frac{2^4.5^5.11^2.7}{2^3.5^3.7^2.11}=\frac{2^3.2.5^3.5^2.11.11.7}{2^3.5^3.7.7.11}=\frac{2.5^2.11}{7}=\frac{61}{7}\)

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ngu 

tao lop5 ok

\(\frac{2^4\cdot5^2\cdot11^2\cdot7}{2^3\cdot5^3\cdot7^2\cdot11}\)

\(=\frac{2\cdot11}{5\cdot7}\)

\(=\frac{22}{35}\)

 = 770 K MINH NHA

\(\frac{2^3.2.5^2.11.11.7}{2^3.5^2.5.7.7.11}=\frac{2.11}{5.7}=\frac{22}{35}\)

nha

tính bằng cách thuận tiện nhất nhé

=1/4*55/36

=55/144

Lời giải:

$A=2.11+2.13+2.15+...+2.29$

$=2(11+13+15+...+29)$

Tổng $11+13+15+...+29$ là tổng các số cách đều nhau 2 đơn vị.

Số số hạng: $(29-11):2+1=10$ (số)

$11+13+15+...+29=(29+11).10:2=200$

$A=2.200=400$

TA CÓ : \(\frac{2^3.3^4}{2^2.3^2.5}\)= \(\frac{2^3.3^4}{\left(2.3\right)^2.5}\)= \(\frac{2^3.3^4}{6^2.5}\)= \(\frac{2^3.3^4}{36.5}\)= \(\frac{8.81}{180}\)=  \(\frac{648}{180}\)= 648 : 180 = 3,6 HOẶC \(\frac{648}{180}\)= \(\frac{18}{5}\)

câu b) thì sao bạn

ngu..............................

tao lao

\(A=\frac{\left(2^2\cdot3\right)^3\cdot11^4\cdot5-\left(11\cdot2\right)^4\cdot3^3}{\left(5^2\cdot3\right)^2\cdot11^4-\left(2\cdot3\cdot5\right)^2\cdot11^5}\)

\(A=\frac{2^6\cdot3^3\cdot11^4\cdot5-11^4\cdot2^4\cdot3^3}{5^4\cdot3^2\cdot11^4-2^2\cdot3^2\cdot5^2\cdot11^5}=\frac{2^4\cdot3^3\cdot11^4\cdot\left(2^2\cdot5-1\right)}{3^2\cdot5^2\cdot11^4\cdot\left(5^2-2^2\cdot11\right)}\)

\(A=\frac{2^4\cdot3\cdot19}{5^2\cdot\left(-19\right)}=-\frac{48}{25}\)

Bài làm

\(A=\frac{12^3.121^2.5-22^4.3^3}{75^2.11^4-30^2.11^5}\)

\(A=\frac{\left(3.2.2\right)^3.\left(11^2\right)^2.5-\left(11.2\right)^4.3^3}{\left(3.5.5\right)^2.11^4-\left(5.2.3\right)^2.11^5}\)

\(A=\frac{3^3.2^3.2^3.11^4.5-11^4.2.2^3.3^3}{3^2.5^2.5^2.11^4-5^2.2^2.3^2.11.11^4}\)

\(A=\frac{3^3.2^3.11^4.\left(5-2\right)}{3^2.5^2.11^4.\left(1-2^2\right).11}\)

\(A=\frac{3.2^3.1.3}{1.5^2.1.\left(-3\right).11}\)

\(A=\frac{24.3}{-825}\)

\(A=\frac{72}{-825}\)

~ Bạn tự bấm máy tính để rút gọn nhé ~
# Chúc bạn học tốt #

\(2.11^2-11.\left(25-14\right)=2.\left(11.11\right)-11.11=\left(2.11\right).11-11.11=\left(2.11-11\right).11=11.11=121\)

a,51781,53086

b,-11776/2

c,22/35