ta co :1x.2x=366
2x=366
=>x=366:2=183
vay x=183
ta co :1x.2x=366
2x=366
=>x=366:2=183
vay x=183
1X!+2x!+3x!+4x!
Tìm x ∈ N biết:
a, x 10 = 1 x
b, x 10 = x
c, 2 x - 15 5 = 2 x - 15 3
2914^(x-1).2x=1x
Tìm xϵN biết:
A)2x-15=17
B)(2x-11)5=24.32+99
C)x10=1x
x+1x+2x+3x+...+30x=465465
Tìm x ∈ N biết:
a) x 10 = 1 x
b) x 10 = x
c) ( 2 x - 15 ) 5 = ( 2 x - 15 ) 3
1/ 3(x - 1) - 5(x - 2) = 4(x + 1)
2/ -2(x - 2) - 4(x + 1) = -3(x + 3)
3/ 3x\(^2\) + 2x = 0
4/ x\(^2\) - 5x = 0
5/ (2x - 3)\(^2\) = 36
6/ (5x - 1)\(^3\) = 125
7/ 3\(^x\) + 1 = 27
tìm x biết 1x+2x+3x+...+10x = 165
Tìm số nguyên x, biết:
a) 4 3 = 2 x − 1 x
b) 2 x − 1 3 = 3 x + 1 4
c) 4 x + 2 = 7 3 x + 1
d) − 3 x + 1 = 4 2 − 2 x