\(\frac{3}{8}x-\frac{3}{5}x=\frac{1}{3}\)
\(=x\left(\frac{3}{8}-\frac{3}{5}\right)=\frac{1}{3}\)
\(=x\cdot\left(-\frac{9}{40}\right)=\frac{1}{3}\)
\(\Rightarrow x=\frac{1}{3}:\left(-\frac{9}{40}\right)\)
\(\Rightarrow x=-\frac{40}{27}\)
Ủng hộ mk nka!!!^_^^_^^_^
Tính
a) (-1/5 + 5/8) + -3/8
b) -5/21 - (16/21 - 1)
c)3/7 . -5/11 + 3/7 . 6/11
d) 4/3 : -3/8 + 8/-3 . -7/3
e) 3 2/5 + -5/8 - ( 0,4 + 3/8)
A = 1+ 5+ 5^2 + 5^3 + 5^4 + 5^5 + 5^6 + 5^7 + 5^8 + 5^9
1 + 5 + 5^2 + 5^3 + 5^4 + 5^5 + 5^6 + 5^7 + 5^8
B = 1 + 3 + 3^2 + 3^3 + 3^4 + 3^5 + 3^6 + 3^7 + 3^8 + 3^9
1 + 3 + 3^2 + 3^3 + 3^4 + 3^5+ 3^6 +3^7 + 3^8
So sánh A; B
so sánh 1+5+5^2+..+5^9/1+5+5^2+5^3+...+5^8 với 1+3+3^2+..+3^9/1+3+3^2+3^3+...+3^8
a) 4 3/8 + 5 2/3 b) 2 3/8 + 1 1/4 + 3 6/7
c) 2 3/8 - 1 1/4 + 5 1/3 d) (5/2 + 1/3) : ( 1 - 1/2)
e) (5/2 - 1/3) x 9/2 - 6/7
A = 1+ 5+ 5^2 + 5^3 + 5^4 + 5^5 + 5^6 + 5^7 + 5^8 + 5^9
1 + 5 + 5^2 + 5^3 + 5^4 + 5^5 + 5^6 + 5^7 + 5^8
B = 1 + 3 + 3^2 + 3^3 + 3^4 + 3^5 + 3^6 + 3^7 + 3^8 + 3^9
1 + 3 + 3^2 + 3^3 + 3^4 + 3^5+ 3^6 +3^7 + 3^8
So sánh A; B
Tính 1) 4/5 +13/18 2) 3/7 -11/8 3) -7/10 - -4/5 4) 3/20 -1/25 5) 2/3 - 5/6 6) 1/4 + -3/8 - 19/10 7) -9/10 - -7/18 8) 3/10 - 11/18 9) 3/5 -5/6 + -7/12 10) -4/9 - (-5 )/6 - 3/8
so sanh A va B biet A=1+5+5^2+5^3+...+5^9/1+5+5^2+5^3+...+5^8 va B=1+3+3^2+3^3+...+3^9/1+3+3^2+3^3+...+3^8
so sanh
A=1+5+5^2+....++5^9 / 1+5+5^2+...+3^8 va B=1+3+3^2+...+3^9 / 1+3+3^2+...+3^8
a.1/7.-3/8+-13/8
b.3/5.13/40-1/10.16/23
c.(-3/4+2/5):3/7+(3/5+1/4):3/7
d.7/8:(2/9-1/8)+7/8:(1/6-5/12)
e.(-2/3+3/7):4/5+(-1/3+4/7):4/5
Giúp mình với..
So sánh : A=1+5+5^2+5^3+...+5^9/1+5+5^2+...+5^8
B=1+3+3^2+....+3^9/1+3+3^2+3^8
GIÚP MÌNH VỚI !!!!
