\(\dfrac{12}{16}+\dfrac{1}{2}=\dfrac{3}{4}+\dfrac{1}{2}=\dfrac{5}{4}\)
\(\dfrac{12}{16}+\dfrac{1}{2}=\dfrac{3}{4}+\dfrac{2}{4}=\dfrac{5}{4}\)
2 tính : a) 1+1/4+1/8+1/16 =
=
b) 2-1/8-1/12-1/16 =
=
c) 4/99 x 18/5 : 12/11 + 3/5 =
=
d) ( 1-3/4 ) x ( 1+ 1/3 ) : ( 1- 1/3 ) =
=
1+ 1/4+1/8+1/16
2-1/8-1/12-1/16
4/99*18/5:12/11+3/5
(1-3/4)*(1+1/3):(1-1/3)
A= \(A=1*2*3+2*4*6+4*8*12+8*16*24 \over 2*3*4+4*6*8+8*12*16+16*24*32\)
tính nhanh hộ mình 2 câu này với :
1*2+2*4+3*6+4*8+5*10 / 3*4+6*8+9*12+12*16+15*20
2*4+2*4*8+4*8*16+8*16*32 / 3*4+2*6*8+4*12*168*24*32
12/16-1/2
tinh bang cach thuan tien nhat
1/2+1/6+1/12+1/20
1/2+1/6+1/12+1/20+..........+1/9900
1/2+1/3+1/4+1/8+1/16
1/2+1/3+1/4+1/8+1/16+........+1/512
2- 1/8 - 1/12- 1/16
1/2+1/6+1/12+...+1/y+(y+1)=16/17
Viet tiep ba so thich hop vao choo cham cua moi day so :
a) 10 ; 12 ; 14 ; 16 ; ..................... ; 24.
b) 10 ; 13 ; 16 ; 19 ; ...................... ; 28
c) 1 ; 2 ; 3 ; 5 ; 8 ; ...........................; 55.
d) 1 ; 4 ; 9 ; 16 ; 25 ; ....................... ; 81
e) 1 ; 2 ; 4 ; 8 ; 16.
g) 2 ; 6 ; 12 ; 20 ; 30
Cac day so tren, tung day so deu phai neu quy luat.
