\(x.x=16\)
\(\Rightarrow x^2=16\)
\(\Rightarrow\left[{}\begin{matrix}x=4\\x=-4\end{matrix}\right.\)
\(x^2=16\)
nên \(x\in\left\{4;-4\right\}\)
Tinh gia tri cua phan so: A= 2 x 3 + 2 x 4 x 8 + 4 x 8 x 16 + 8 x 16 x 32/ 3x 4 + 2 x 6 x 8 + 4 x 12 x 16 + 8 x 24 x 32
Tìm số nguyên x, biết:
6 + 2.(x - 19) = 16
(-240) : x – 16 = 64
2x3 = 16
Tìm x:
C)x⋮3,x<20
D)16⋮x,0<x<16
\(\dfrac{4}{3.5}\) + \(\dfrac{8}{5.9}\) + \(\dfrac{12}{9.15}\)+.......+
\(\dfrac{32}{x(x+16)}\) = \(\dfrac{16}{15}\)
\(\dfrac{32}{x(x+16)}\) = \(\dfrac{16}{15}\)
\(\dfrac{HeLp}{me}\) \(\dfrac{nguyễn}{đức}{Trí}\)
Tính hợp lí :
a= 39 x 118 +29 x 82
b = 37 x 39 + 78 x 14 + 13 x 85 + 52 x 55
c= 368 : 16 + 752 : 16 + 480 : 16
d= 5 x 11 x 18 + 9 x 31 x 10 + 4 x 29 x 45
Tìm x biết : 18 .(x-16) = 18
A. x = 15 B. x =16 C. x =17 D. x =18
Câu 30: Tìm x biết : 18 .(x-16) = 18
A. x = 15 B. x =16 C. x =17 D. x =18
Tìm x biết (x-5)+(x-4)+(x-3)+...+15+16=16
Tìm x :
g , 2x +15 - x = 16
h , 2x + 15 = - x - 16
i , 2x - 15 = - 11 - ( -16 )
k , x - ( 17 - x ) = x - 7
Tìm x :
g , 2x +15 - x = 16
h , 2x + 15 = - x - 16
i , 2x - 15 = - 11 - ( -16 )
k , x - ( 17 - x ) = x - 7
