\(=\frac{\left(2^{31}.3^{16}\right).2^{19}.3^{45}+\left(2^{31}.3^{16}\right).2^{59}}{\left(2^{31}.3^{16}\right).2^{20}.3^{45}+\left(2^{31}.3^{16}\right)}\\ =\frac{\left(2^{31}.3^{16}\right).\left(2^{19}.3^{45}+2^{59}\right)}{\left(2^{31}.3^{16}\right).\left(2^{20}.3^{45}+1\right)}\\ =\frac{2^{19}.3^{45}+2^{59}}{2^{20}.3^{45}+1}\)

\(2^{19}.\frac{3^{45}+2^{40}}{2^{20}.3^{45}+1}\)

so sánh 

ta có 

333⁴⁴⁴=333^4.111=(333⁴)¹¹¹

444³³³=444^3.111=(444³)¹¹¹

So sánh 333⁴và 444³ ta có 

333⁴=(3.111)⁴=3⁴ . 111⁴=81.111⁴

444³=(4.111)³=4³. 111³=64. 111³

Vì 81.111⁴>64.111³

Suy ra 333⁴⁴⁴>444³³³

\(\frac{2^{50}.3^{61}+2^{90}.3^{16}}{2^{51}.3^{61}+2^{31}.3^{61}}\)

\(=\frac{3^{61}\left(2^{50}+2^{90}\right)}{3^{61}\left(2^{51}+2^{31}\right)}\)

\(=\frac{2^{50}+2^{90}}{2^{51}+2^{31}}\)

\(=\frac{2^{31}\left(2^{19}+2^{59}\right)}{2^{31}\left(1+2^{20}\right)}\)

\(=\frac{2^{19}+2^{59}}{1+2^{20}}\)

= ???????? 

:3

khoo qua minh chiu 

k dong vien minh di ban 

( noi nho ) : tk nay khon vai 

5^x+1-5^x=500

(5^x-5^x)+1=500

0.5^x=499

Sai đề

5^x + 1 - 5^x = 500

=> 5^x - (-1) - 5^x = 500

=> 5^x - 5^x - (-1) = 500

=> 0 - (-1) = 500

=> 1 = 500

=> Sai đề

làm bừa thui,ai tích mình mình tích lại

Số số hạng là : 

Có số cặp là :

50 : 2 = 25 ( cặp )

Mỗi cặp có giá trị là :

99 - 97 = 2 

Tổng dãy trên là :

25 x 2 = 50

Đáp số : 50

\(\frac{2^{50}.3^{61}+2^{90}.3^{16}}{2^{51}.3^{61}+2^{91}.3^{16}}=\frac{2^{50}.3^{16}.\left(3^{45}+2^{40}\right)}{2^{51}.3^{16}.\left(3^{45}+2^{40}\right)}=\frac{1}{2}\)

Bn vào phần Câu hỏi tương tự ý. Có 1 bn cũng có câu hỏi giống như thế.

-Học tốt-

\(\frac{2^{50}.3^{61}+2^{90}.3^{16}}{2^{51}.3^{61}+2^{91}.3^{16}}\)

\(\Leftrightarrow\frac{2^{50}+2^{90}}{2^{50}.2+2^{90}.2}\)

\(\Leftrightarrow\frac{1+1}{2+2}\)

\(\Leftrightarrow\frac{1}{2}\)

_{P/s: Không chắc nhé! '-'}

mọi người giúp mình nha

a) \(\frac{7^3.5^8}{49.25^4}=\frac{7^3.5^8}{7^2.5^8}=7\)

b) \(\frac{3^9.25.5^3}{15.625.3^8}=\frac{3^9.5^2.5^3}{3.5.5^4.3^8}=\frac{3^9.5^5}{3^9.5^5}=1\)

c) \(\frac{2^{50}.3^{61}+2^{90}.3^{16}}{2^{51}.3^{61}+2^{91}.3^{16}}=\frac{2^{50}.3^{16}\left(3^{45}+2^{40}\right)}{2^{51}.3^{16}\left(3^{45}+2^{40}\right)}=\frac{1}{2}\)

d) \(\left(\frac{2}{5}-\frac{1}{2}\right)^2+\left(\frac{1}{2}+\frac{3}{5}\right)^2\)

\(=\left(\frac{-1}{10}\right)^2+\left(\frac{11}{10}\right)^2\)

\(=\frac{1}{100}+\frac{121}{100}=\frac{122}{100}=\frac{61}{50}\)

a) \(\frac{7^3.5^8}{49.25^4}=\frac{7^3.5^8}{7^2.\left(5^2\right)^4}=\frac{7^3.5^8}{7^2.5^8}=7\)

b) \(\frac{3^9.25.5^3}{15.625.3^8}=\frac{3^9.5^2.5^3}{5.3.5^4.3^8}=\frac{3^9.5^5}{5^5.3^9}=1\)

c) \(\frac{2^{50}.3^{61}+2^{90}.3^{16}}{2^{51}.3^{61}+2^{91}.3^{16}}=\frac{2^{50}.3^{16}\left(3^{45}+2^{40}\right)}{2^{51}.3^{16}\left(3^{45}+2^{40}\right)}=\frac{1}{2}\)

d) \(\left(\frac{2}{5}-\frac{1}{2}\right)^2+\left(\frac{1}{2}+\frac{3}{5}\right)^2=\left(-\frac{1}{10}\right)^2+\left(\frac{11}{10}\right)^2=\frac{1}{100}+\frac{121}{100}=\frac{122}{100}=1,22\)

Ghi đề khó hiểu quá Nguyen Ngoc Vy Phuong

moi hok lop 6

Ta thấy: \(\left(x-5\right)^{88}\ge0\) 

\(\left(x+y+3\right)^{496}\ge0\) 

\(\Rightarrow\left(x-5\right)+\left(x+y+3\right)^{496}\ge\) ( Đó là điều đương nhiên )

Vậy: \(x;y\in R\)

\(\left(x-5\right)^{88}+\left(x+y+z\right)^{496}\ge0\)0

Dấu "=" xảy ra kih và chỉ khi \(\hept{\begin{cases}\left(x-5\right)^{88}\\\left(x+y+3\right)^{496}\end{cases}\Leftrightarrow\hept{\begin{cases}x=5\\5+y+3=0\end{cases}}}\)\(\Leftrightarrow\hept{\begin{cases}x=5\\y=-8\end{cases}}\)

Mk chi p trg hop bang 0 thoi

Neu: \(\left(x-5\right)^{88}+\left(x+y+3\right)^{496}\)=0

Thi: \(\left(x-5\right)^{88}\)=\(0\)

ma x mu may cung bang 0

=> \(x-5=0\\ =>x=5\)

=> \(x+y+3=0\)

Ma \(x=5\)

nen \(x+y+3=5+y+3=0\)

=> \(y=-8\)

Vay \(x=5\)\(,y=-8\)

Trg hop lon hon 0 thi chac la hk co!