Tìm x biết: x : 53 = 2552 + 4079.
A. x = 139335
B. x = 218739
C. x = 351443
D. x = 385358
Tìm x biết:
a ) | x | = 1 5 + 3 4 ; b ) | x − 5 | = − − 5 3 + 1 4 ;
c ) x − 1 4 = 3 2 + 1 3 − 7 6 ; d ) x − 4 3 = 1 6 + 5 3 − 1 2 + 7 12 .
a ) x = 19 20 x = 19 20 b ) x = 83 12 x = − 37 12
c ) x = 31 12 x = − 25 12 d ) x = 13 4 x = − 7 12
Tìm x, biết:
a ) | x | = 4 − 3 + 7 4 ; b ) | x − 4 | = − 6 7 + 3 2 ; c ) x − 1 2 = − 7 10 + 9 4 ; d ) x − 7 9 = 7 12 + 5 3 − 11 4
a ) x = 5 12 x = − 5 12 b ) x = 89 14 x = 23 14
c ) x = 69 20 x = − 49 20 d ) x = 22 9 x = − 8 9
Tìm số nguyên x, biết:
a) (135 + x) - 135 = 0; b) ( -562) - ( x- 562) = 0;
c) 61 + ( x - 23) = 91; d) 11- ( -53 + x) = 97.
a) 135 + x -135 = 0 => (135 - 135) + x = 0 => x = 0.
b) -562 - x + 562 = 0 => (-562 + 562) - x = 0 => - x = 0 => x = 0.
c) 61 + x - 23 = 91=> (61 - 23) + x = 91=>38 + x = 91=> x = 53.
d) 11 + 53 - x = 97 => 64 - x = 97 => x = 64 - 97 => x = - 33
Tìm số nguyên x, biết: a) (135 + x) - 135 = 0; b) ( -562) - ( x- 562) = 0; c) 61 + ( x - 23) = 91; d) 11- ( -53 + x) = 97.
Tìm x, biết:
a ) | x | − 3 4 = 5 3 ; b ) x − 3 2 = 1
c ) x − 3 2 + 11 4 = 15 4 ; d ) 17 4 − 5 6 − x = − 7 4 e ) x + 1 5 2 − 9 25 = 0 ; f ) x + 1 5 2 + 17 25 = 26 25
a ) | x | − 3 4 = 5 3 = > | x | = 29 12 = > x = 29 12 x = − 29 12
b) x − 3 2 = 1 = > x − 3 2 = 1 x − 3 2 = − 1 = > x = 5 2 x = 1 2
c) x − 3 2 + 11 4 = 15 4 = > x − 3 2 = 1 = > x = 5 2 x = 1 2
d) 17 4 − 5 6 − x = − 7 4 = > 5 6 − x = 6 = > x = − 31 6 x = 41 6
e)
x + 1 5 2 − 9 25 = 0 = > x + 1 5 2 = 9 25 = > x + 1 5 = 3 5 x + 1 5 = − 3 5 = > x = 2 5 x = − 4 5
f) x + 1 5 2 + 17 25 = 26 25 = > x + 1 5 2 = 9 25 = > x = 2 5 x = − 4 5
Tìm x ∈ ℤ ,biết:
a ) 5 2 + − 11 2 < x < 8 3 + 5 6 ; b ) 1 5 + 2 35 < x 35 < − 3 7 + 4 5 ;
c ) 1 2 + − 3 5 + 1 10 ≤ x ≤ 8 3 + 14 6 ; d ) 1 4 + 5 12 + − 5 3 ≤ x ≤ 11 5 + − 5 10 + 1 2
a) x ∈ {-2;-1;;0;1;2;3}
b) x ∈ {10;11;12}
c) x ∈ {0;1;2;3;4;5}
d) x ∈ {-1;0;1;2}
Tìm x ∈ ℤ ,biết:
a ) 5 3 + − 14 3 < x < 8 5 + 4 10 ; b ) 5 21 + − 3 7 < x 21 < − 2 7 + 8 21 ;
c ) 1 2 + 1 3 + 1 6 ≤ x ≤ 15 4 + 18 8 ; d ) 11 3 + − 19 6 + − 15 2 ≤ x ≤ 19 12 + − 5 4 + − 10 3
a) – 3 < x < 2 => x ∈ {-2;-1;0;1}
b) − 4 21 < x 21 < 2 21 => x ∈ {-3;-2;-1;0;1}
c) 1 ≤ x ≤ 6 => x ∈ {-3;-2;-1;0;1}
d) -7 ≤ x ≤ -3 => x ∈ {-3;-2;-1;0;1}
tìm số nguyên x, biết:
a) 353-x=46+(3x-21)
b) -(x+81)=(2x+12)-(5+x)
c)-x+821+534=499+(x-84)
d) x+53=(400-9x)-447
Tìm x E N , cho biết
a) x < 6
b) x <= 5
c ) 53 < x <= 57
d) 5 <= x <= 5
a)X=0,1,2,3,4,5
b)x=0,1,2,3,4,5
c)54,55,56,57
d)ko có số tự nhiên x nào mà lớn hơn hoặc =5 và x bé hơn hoặc bằng 5
K nhé?
\(a.x\in\left\{1;2;3;4;5\right\}\)
\(b.x\in\left\{1;2;3;4;5\right\}\)
\(c.x\in\left\{54;55;56;57\right\}\)
\(d.x\in\left\{5\right\}\)