b: \(\Leftrightarrow x^5=2^5\)
hay x=2
(x+1)^3 =2^3.3+3
5+2.3^x+2=23
(2x-1)^5=32
49.7^x+1=49^8
3^x+3-3^x=234
Tim X
(3x-6).3=33
(x-1)2:2=8
3x+1-2.32=32
4221:(x-16)=21
Tìm x
a) -1/2 . x = 5
b) x-1/9 = 8/3
c) x + 5/6 = 16/42 - -8/56
d) 1 3/4x - 5 = -3 1/3
e) 3 1/3 - 3/4 : x = -1/6
g) 3/x + 5 = 15%
h) 1/2 + 1/2.3 + 1/3.4 +...+1/x(x+1) = 49/50
Tìm x
a) -1/2 . x = 5
b) x-1/9 = 8/3
c) x + 5/6 = 16/42 - -8/56
d) 1 3/4x - 5 = -3 1/3
e) 3 1/3 - 3/4 : x = -1/6
g) 3/x + 5 = 15%
h) 1/2 + 1/2.3 + 1/3.4 +...+1/x(x+1) = 49/50
Mọi người giúp mình bài tìm x
1) (x-2/9)^3 = (8/27)^2
2)2.3^x -405 = 3^x-1
3)4/3 : 0,8 = 0,75x : (-1,5)
Tim x
(3x-6).3=33
(x-1)2:2=8
3x+1-2.32=32
4221:(x-16)=21
Tinh
2+22+23+24+............+2100
Tìm X biết:
a/x-2.32:3=12
b/22.x+32.x=39
c/2x-2.32:3=12
d/36:33+5x=57
a/x=2^8:2^4+3^2.3^3
b/6x-39=5628:28
B1 : thu gọn các biểu thực sau :
a , 4. (a-3) - (a2+2a) - 5a
b, a.(a+3) - [a.(a-3)+2.(a+1)]
B2 : tìm x :
a, 3.(x-4) - (2x+3) = 7-2x
b, x.(x2-3) - (x3+x) - 5x = (-8)2
c, x.(x-1) - 3(x+2) - x2= -2.33
