Tìm y :
( y + 1/3 ) + ( y + 1/9 ) + ( y + 1/27 ) + ( y + 1/81 ) = 56/81
y + 1/3 + y + 1/9 + y + 1/27 + y + 1/81 = 56/81
y x 4 + ( 1/3 + 1/9 + 1/27 +1/81 ) = 56/81
y x 4 + ( 27/81 + 9/81 + 3/81 + 1/81 ) = 56/81
y x 4 + 40/81 = 56/81
y x 4 = 56/81 - 40/81
y x 4 = 16/81
y = 16/81 : 4
y = 4/81
Tìm y biết: (y + 1/3) + (y + 1/9) + (y + 1/27) + (y + 1/81) = 56/81
( y +1/3) + ( y + 1/9 ) + (y+1/27) + (y+1/81)= 56/81
Tim y biet :
( y + 1/3 ) + ( y + 1/9 ) + ( y + 1/27 ) + ( y + 1/81 ) = 56/81
a) (y+1/3)+(y+2/9)+(y+1/27)+(1/81)=56/81
b) (1/2+1/4+1/8+1/16):y=1/2+1/6+1/12+1/20+...+1/132
1. \(\left(y+\dfrac{1}{3}\right)\)+\(\left(y+\dfrac{1}{9}\right)\)+\(\left(y+\dfrac{1}{27}\right)\)+\(\left(y+\dfrac{1}{81}\right)\)=\(\dfrac{56}{81}\)
2. 18:\(\dfrac{Xx0,4+0,32}{X}\)+5=14
3. \(\dfrac{3xX}{2}\)=\(\dfrac{2}{5}+\)X\(+\dfrac{1}{3}\)
4. X-\(\dfrac{11}{15}\)=\(\dfrac{3+X}{5}\)
tìm x,y :
\(\frac{1}{2}-\left(6\frac{5}{9}+x-\frac{117}{8}\right):\left(12\frac{1}{9}\right)=0\)
\(\left(y+\frac{1}{3}\right)+\left(y+\frac{2}{9}\right)+\left(y+\frac{1}{27}\right)+\left(y+\frac{1}{81}\right)=\frac{56}{81}\)
a)Tính nhanh:
\(\frac{20,2x5,1-30,3+3,4+14,58}{14,58x460+7,29x540x2}\)
b)Tìm y biết
(y + \(\frac{1}{3}\)) + (y+\(\frac{1}{9}\)) + (y+\(\frac{1}{27}\)) + (y+\(\frac{1}{81}\)) = \(\frac{56}{81}\)
Tìm y biết : { y + 1/3 } + { y + 1/9 } + { y + 1/27 } = 25/27
tìm y ( 1/1x3 + 1/3x5 + 1/5x7 + 1/7x9 + 1/9x11 ) xy = 2/3
nhanh hộ tớ nhé chiều nay tớ phải nộp
