X:2+X:4x6+X:2x4=8
tim x
x:2+x:4x6+x:2x4
x:2 +x:4x6 +x :2x4 = ?
=> x:2+x:24+x:8 = ?
=> x:(2+24+8) =?
=> x:34 = ?
(đề bài thiếu hả bạn)
tìm y:
(2/2x4 + 2/4x6 + 2/6x8 + 2/8x10) x y = 1/3
`(2/(2xx4)+2/(4xx6)+2/(6xx8)+2/(8xx10))xxy=1/3`
`=>(1/2-1/4+1/4-1/6+1/6-1/8+1/8-1/10)xxy=1/3`
`=>(1/2-1/10)xxy=1/3`
`=>(5/10-1/10)xxy=1/3`
`=>4/10xxy=1/3`
`=>2/5xxy=1/3`
`=>y=1/3:2/5`
`=>y=1/3xx5/2`
`=>y=5/6`
1/2x4+1/4x6+…+1/(2x-2)x 2x=3/16 (x thuộc N , x lớn hơn hoặc bằng 2) Cíu mình zứi
Tính :
N = ( 1/2x4 + 1/4x6 + 1/6x8 + 1/8x10 + ....... + 1/98 X 100 ) : ( 1/2 + 1/4 + 1/8 + 1/16 + ........ + 1/512 )
giúp tính \(\dfrac{2}{2x4}+\dfrac{2}{4x6}x...x\dfrac{2}{2014x2016}\)
Nguyễn Huy Tú soyeon_Tiểubàng giải Akai Haruma
(1+1/1x3)x(1+1/2x4)x(1+1/3x5)x(1+1/4x6)x(1+1/5x7)
Tính và rút gọn kết quả thành PSTG
4/3x1 x 9/2x4 x 16/3x5 x 25/4x6
43𝑥1⋅92⋅𝑥4𝑥163⋅𝑥5⋅254⋅𝑥6
12𝑥12⋅𝑥4𝑥163⋅𝑥5⋅254⋅𝑥6
chúc bạn học tốt
4/3x1x9/2x4x16/3x5x25/4x6=172800/144=1200/1
tk nha
Bài 1 tìm y
a) (1/2x4+1/4x6+1/6x8+1/8x10)x y =1/3
b) y:8+y x8-56,78=69,11x2
\(\frac{4}{2x4}x\frac{4}{4x6}x\frac{4}{6x8}x.......x\frac{4}{16x18}x\frac{4}{18x20}\)
ax4=1/2-1/4+1/4-1/6+1/6+1/8+.......+1/16-1/18+1/18+1/20
ax4 =1/2-1/20
ax4 =9/20
a=9/20:4
a=9/80