2x+2-3*2x=16
x2+7x+16=(2x-3) \(\sqrt{2x^2+2x-16}\)
Tìm số tự nhiên x biết:
a) (10-2x).(3x-18)=0 b) 10 + 2x = 165: 216 c) 28 - 2.(x - 4)2=10 d) (15-x)3.(x2 + 16) = 0 e) 52x - 3 - 2.52 = 52 . 3
f) (8 - x3).(x2 + 16) = 0 j) (2x + 5) + (2x + 10) +(2x + 15) +...+(2x + 95) = 77520
tìm x nguyên bt:
|5(2x+3)| + |2(2x+3)| + |2x+3| = 16
`|5(2x+3)|+|2(2x+3)|+|2x+3|=16`
`<=>5|2x+3|+2|2x+3|+|2x+3|=16`
`<=>8|2x+3|=16`
`<=>|2x+3|=2`
`<=>[(2x+3=2),(2x+3=-2):}<=>[(x=-1/2),(x=-5/2):}` (Mà `x in ZZ`)
`=>` Không có giá trị nào của `x` thỏa mãn.
viết gọn: 3*(2^2+1)*(2^4+1)*(2^8+1)*(2^16+1)*(2x+1)^2+(3-2x)^2+2*(2x+1)*(3-2x)
Tìm x biết : |5(2x+3)| + |2(2x+3)| + |2x+3| = 16
|5(2x+3)| + |2(2x+3)| + |2x+3| = 16
|5| * |2x+3| + |2| * |2x+3| + |2x+3| = 16
8* |2x+3| = 16
|2x+3|= 2
\(\Rightarrow\orbr{\begin{cases}2x+3=2\\2x+3=-2\end{cases}\Rightarrow\orbr{\begin{cases}x=-\frac{1}{2}\\x=-\frac{5}{2}\end{cases}}}\)
vậy x= -1/2 hoặc x= -5/2
Vì |5(2x+3)|, |2(2x+3)| và |2x+3| luôn luôn là số tự nhiên
=> 5(2x+3)+2(2x+3)+2x+3 = 16
<=> (2x+3).(5+2+1) = 16
<=> 2x+3 = 16:8 = 2
<=> 2x = 2-3 = -1
<=> x = -1:2 = -1/2
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16+x/x^2- 2x+ 18/ 2x-x^2
2y/2x^2+4x/xy_2x^2
4-x^2/ x-3+ 2x-2x^2/3-x+ 5-4x/x-3
a) \(\dfrac{16+x}{x^2-2x}+\dfrac{18}{2x-x^2}\)
\(=\dfrac{16+x}{x^2-2x}-\dfrac{18}{x^2-2x}\)
\(=\dfrac{16+x-18}{x^2-2x}\)
\(=\dfrac{x-2}{x\left(x-2\right)}\)
\(=\dfrac{1}{x}\)
(2x+1)^2-16^3:(2x)^2=10
a,5(2x+3)+/2(2x+3)/+/2x+3/=16
b,/x^2+/6x-2/=x^2+4
a)
5(2x + 3) + \(\left|2\left(2x+3\right)\right|\) + \(\left|2x+3\right|\) = 16
=> 5(2x + 3) + 2 . 2x + 3 + 2x + 3 =16
=> (2x + 3).(5+2+1) = 16
=> (2x +3) . 8 = 16
=> 2x + 3 = 16 : 8 = 2
=> 2x = 2 - 3 = -1
=> x = \(\frac{-1}{2}\)
Tìm x biết
|5(2x + 3)| + |2(2x + 3)| + |2x + 3| = 16
2(x-1)-3(2x+2)-4(2x+3)=16
2(x - 1) - 3(2x + 2) - 4(2x + 3) = 16
2x - 2 - 6x + 6 - 8x + 12 = 16
(2x - 6x - 8x) - (2 + 6 + 12) = 16
(-12) . x - 20 =16
(-12) . x = 16 + 20 = 36
x = 36 : (-12) = -3