3/1^2.2^2 + 5/2^2.3^2 + 1/3^2.4^2+....19/9^2.10^2 < 1
Tìm giá trị của các biểu thức sau :
a) \(\dfrac{4^2.4^3}{2^{10}}\)
b) \(\dfrac{\left(0,6\right)^5}{\left(0,2\right)^6}\)
c) \(\dfrac{2^7.9^3}{6^5.8^2}\)
d) \(\dfrac{6^3+3.6^2+3^3}{-13}\)
3.4x+2 -5.4x-1 =748
a,(2^2)^3.4^5
b, [(-4)^2]^2.6
c,16/25 .(4/5)^3
d,(121/64)^2 . (-64/11)^2
e,[(-3)^3]^3 . 271:125
làm rút gọn giúp mình đi ạ cảm ơn ạ
a) \(\dfrac{5^5}{5^x}=5^{18}\)
b) \(\dfrac{2^{4-x}}{16^5}=32^6\)
c) \(\dfrac{2^{2x-3}}{4^{10}}=8^3.16^5\)
d) \(\dfrac{2^3}{2^x}=4^5\)
e) \(9.5^x=6.5^6+3.5^6\)
f) \(7.2^x=2^9+5.2^8\)
Tìm x,y biết :
1) 5x+5x+2=650
2) xy=x4
3) ( x-11+y )2 + ( x-4-y ) 2 = 0
4) ( 3x-5 ) + ( 2y+1 ) 200 < 0
5) 2x=4y-1 và 27y=3x+8
6) 10x:5y=20y
7) 2x+1.3y=22x.3x
Tìm x ∈ Z, biết :
a, -5x + (-4) . 5x+4 - 3 . 5x+3 = 2 . 5 11
b, 3. 5x+2 + 4 . 5x-3 = 19 . 510
c, 5. 2x + 3. 2x+2 = 11. 611 + 2. 613
Tìm x,biết: a)x : \((\dfrac{3}{4})^{3} = (\dfrac{3}{4})^{2} \) b) \(\dfrac{2}{5}^{5} . x = \dfrac{2}{5}^{8}\)
tìm x biết: x:\((\dfrac{3}{4})^3=(\dfrac{3}{4})^2\)
b) \((\dfrac{2}{5})^5.x=(\dfrac{2}{5})^8\)
