32⁹ = (2⁵)⁹ = 2⁴⁵ = (2³)¹⁵ = 8¹⁵  = 8¹³ . 8² = 8¹³ . 2⁶

18¹³ = 9¹³ . 2¹³ 

Vì 9¹³ > 8¹³

     2¹³ > 2⁶

\(\Rightarrow\)32⁹ < 18¹³

\(\Rightarrow\)\(\left(-32\right)^9>\left(-18\right)^{13}\)

Ta có: 32⁹ = (2⁵)⁹ = 2⁴⁵

18¹³ > 16¹³ = (2⁴)¹³ = 2⁵² (⁴)

Ta thấy : 2⁴⁵ < 2⁵² < 18¹³

=> 32⁹ < 18¹³

Ta có: 32⁹ = (2⁵)⁹ = 2⁴⁵

18¹³ > 16¹³ = (2⁴)¹³ = 2⁵² (⁴)

Ta thấy : 2⁴⁵ < 2⁵² < 18¹³

=> 32⁹ < 18¹³

73 nha

73 nhe dap so nay to tra loi dung day nha

mình nghĩ là 73 

Đề thiếu vế phải rồi bạn

làm được mik k cho :)

hu hu :((

75/100+18/21+19/32+1/4+3/21+13/32=3 NHA BN

\(=\frac{3}{4}+\frac{18}{21}+\frac{1}{4}+\frac{19}{32}+\frac{3}{21}+\frac{13}{32}\)

\(=\left(\frac{3}{4}+\frac{1}{4}\right)+\left(\frac{18}{21}+\frac{3}{21}\right)+\left(\frac{19}{32}+\frac{3}{32}\right)\)

\(=1+1+1=3\)

75/100 + 18/21 + 19/32 + 1/4 + 3/21 + 13/32

= (75/100 + 1/4) + (18/21 + 3/21) + (19/32 + 13/32)

= 1 + 1 + 1

= 3

91 cái bánh

d/s la 91

tại mình làm trong violympic co giao cham cho

minh dung

\(\frac{x+5}{20}+\frac{x+5}{21}+\frac{x+5}{32}=\frac{x+5}{23}+\frac{x+5}{54}\)

\(\Leftrightarrow\frac{x+5}{20}+\frac{x+5}{21}+\frac{x+5}{32}-\frac{x+5}{23}-\frac{x+5}{54}=0\)

\(\Leftrightarrow\left(x+5\right)\left(\frac{1}{20}+\frac{1}{21}+\frac{1}{32}-\frac{1}{23}-\frac{1}{54}\right)=0\)

\(\Leftrightarrow x+5=0\)

\(\Leftrightarrow x=-5\)