\(\frac{38}{57}=\frac{2}{3}\)

nha bn 

chúc bn học giỏi

Cảm ơn bạn nhé Linh Nguyễn

\(\frac{38}{57}=\frac{2}{3}\)

Chia cả tử và mẫu cho 19 bạn nhé !!

38/57=2/3 bạn nhé

2/3 ne

\(\dfrac{26}{39}=\dfrac{26:13}{39:13}=\dfrac{2}{3}\)
\(\dfrac{38}{57}=\dfrac{38:19}{57:19}=\dfrac{2}{3}\)

\(\dfrac{26}{39}=\dfrac{26:13}{39:13}=\dfrac{2}{3}\)

\(\dfrac{38}{57}=\dfrac{38:19}{57:19}=\dfrac{2}{3}\)

`26/39=(26:13)/(39:13)=2/3`

`38/57=(38:19)/(57:19)=2/3`

giup to cau nay

38/57 = 2/3 ( Bn chia cho 19 nha )

Mk đầu tiên

Ta có: 38/57 = 38:19/57:19 = 2/3

Rút gọn phân số: \(\frac{38}{57}\)

\(\frac{38}{57}=\frac{38:19}{57:19}=\frac{2}{3}\)

\(\frac{2}{3}\)là phân số tối giản

38/57

=38:19/ 57:19

=2/3

Đáp số:2/3

\(\frac{38}{57}=\frac{38:19}{57:19}=\frac{2}{3}\)

Ta có : \(D=\left(\sqrt{57}+3\sqrt{6}+\sqrt{38}+6\right)\left(\sqrt{57}-3\sqrt{6}-\sqrt{38}+6\right)\)

\(=\left(\sqrt{57}+6\right)^2-\left(3\sqrt{6}+\sqrt{38}\right)^2\)

\(=57+12\sqrt{57}+36-\left(54+12\sqrt{57}+38\right)\)

\(=93-92=1\)

Vậy : \(D=1\)

\(D=\left(\sqrt{57}+3\sqrt{6}+\sqrt{38}+6\right)\left(\sqrt{57}-2\sqrt{6}-\sqrt{38}+6\right)\)

\(=\left(\sqrt{57}+6\right)^2-\left(3\sqrt{6}+\sqrt{38}\right)^2\)

\(=\left(93+12\sqrt{57}\right)-\left(92+12\sqrt{57}\right)\)

\(=1\)

57:5=11 dư 2  82:6= 13 dư 4 46:5=9 dư 1 38:4=9 dư 2

68:3=22 dư 2

57 : 5=11(dư 20   

82 : 6=13(dư 4)

46 : 5=9(dư 1)   

38 : 4=9(dư 2)

68 : 3=22(dư 2)

57 : 5=11(dư 2) 

82 : 6=13(dư 4)

46 : 5=9(dư 1)   

38 : 4=9(dư 2)

68 : 3=22(dư 2)

a=0
 

A=1+(-3)+5+(-7)+...+17