Tính nhanh :
(67/111+2/33-15/117).(1/3-1/4-1/12)
Tính nhanh: \(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)
\(=\)\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right)\times\left(\frac{4}{12}-\frac{3}{12}-\frac{1}{12}\right)\)
\(=\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right)\times0\)
\(=0\)
\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)
=\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{4}{12}-\frac{3}{12}-\frac{1}{12}\right)\)
=\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{1}{12}-\frac{1}{12}\right)\)
=\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).0\)
=0
(67/111+2/33-15/117).(1/3-1/4-1/12)
(67/111+2/33-15/117).(1/3-1/4-1/12)=(67/111+2/33-15/117).0=0
\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)
= \(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{4}{12}-\frac{3}{12}-\frac{1}{12}\right)\)
= \(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).0\)
= \(0\)
C = (67/111 + 2/33 - 15/117) . ( 1/3 - 1/4 - 1/12 )
( 67/111 + 2/33 - 15/117 ) x ( 1/3 - 1/4 -1/12 ) =
(67/111+2/33-15/117)x(1/3-1/4-1/12)
=2836/5291x0
=0.ung ho mk nha
(67/111 + 2/33 - 15/117) x (1/3 -1/4 -1/12)
= (67/111+ 2/33 - 15/117) x (4/12 -3/12 - 1/12)
Ta co vế bên phải bằng 0 nên cả biểu thức = 0.
\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right)\) x \(\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)= \(\frac{2836}{5291}\)x \(0\) = \(0\)
Nhớ click cho mik nha !!!!!!!!!!!!!!!!!!!!!!!!!!!
Tính nhanh:
\(\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{1}{3}-\dfrac{1}{4}-\dfrac{1}{12}\right)\)
\(\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{1}{3}-\dfrac{1}{4}-\dfrac{1}{12}\right)\)
\(=\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{4}{12}-\dfrac{3}{12}-\dfrac{1}{12}\right)\)
\(=\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right).\left(\dfrac{4-3-1}{12}\right)\)
\(=\left(\dfrac{66}{111}+\dfrac{2}{33}+\dfrac{15}{117}\right).0\)
\(=0\)
\(\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\left(\dfrac{1}{3}-\dfrac{1}{4}-\dfrac{1}{12}\right)\\ =\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\left(\dfrac{4}{12}-\dfrac{3}{12}-\dfrac{1}{12}\right)\\= \left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot\left(\dfrac{4-3-1}{12}\right)\\= \left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)\cdot0\\ =0\)
c) 4/9*(5/7+2/5)-4/9*(-2/7+7/5) /////////d) (67/111+2/33-15/117)*(1/3-1/4-1/12) Giúp mk vs ạ
c: \(=\dfrac{4}{9}\left(\dfrac{5}{7}+\dfrac{2}{5}+\dfrac{2}{7}-\dfrac{7}{5}\right)=\dfrac{4}{9}\cdot\left(1-1\right)=0\)
d: \(=\dfrac{4-3-1}{12}\cdot\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)=0\cdot\left(\dfrac{67}{111}+\dfrac{2}{33}-\dfrac{15}{117}\right)=0\)
tìm x
a) (x+1/5)mũ 2 +17/25=26/25
b)-1 5/27 - (3x-7/9)mux3= -24/27
c) -2/7<x/3<11/4
tính nhanh
a)(1999/2011-2011/1999)-(-12/1999-12/2011)
b) 67/111+2/33-15/117).(1/3-1/4-1/12)
C=(\(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\))x(\(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\))
\(C=\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right)x\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)
\(\Rightarrow C=\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right)x\left(\frac{1}{12}-\frac{1}{12}\right)\)
\(\Rightarrow C=\left(\frac{67}{11}+\frac{2}{33}-\frac{15}{117}\right)x0\)
\(\Rightarrow C=0\)
C=(67/111 +2/33 −15/117 )x(1/3 −1/4 −1/12 )
= 1/3 - 1/4 - 1/12 = 0
mà bao nhiêu nhân 0 vẫn bằng 0
vậy C = 0
\(\left(\frac{67}{111}+\frac{2}{33}-\frac{15}{117}\right).\left(\frac{1}{3}-\frac{1}{4}-\frac{1}{12}\right)\)
ve 2 bang 0
con ve 1 o can tinh du co lon
vi 0 nhan bao nhieu cung bang o