Rút gọn biểu thức:
A= 1+1/2+1/2^2+1/2^3+...+1/2^2012
B= ( 1/99+12/999+123/999)(1/2-1/3-1/6)
tính giá trị biểu thức : Q=(1/99+12/999+123/999)(1/2-1/3-1/6)
\(Q=\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right)\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)
\(Q=\left(\frac{1+12+123}{999}\right)\left(\frac{3}{6}-\frac{2}{6}-\frac{1}{6}\right)\)
\(Q=\left(\frac{136}{999}\right)\left(\frac{0}{6}\right)\)
\(Q=0\)
tính giá trị của biểu thức: Q = (1/99+12/999+123/999). (1/2-1/3-1/6)
Tính giá trijcuar biểu thức
Q= (1/99 + 12/999 + 123/ 999 ). ( 1/2 -1/3- 1/6)
Có: \(Q=\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right).\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)
\(=\left(\frac{1}{2}+\frac{12}{999}+\frac{123}{999}\right).\left(\frac{3}{6}-\frac{2}{6}-\frac{1}{6}\right)\)
\(=\left(\frac{1}{2}+\frac{12}{999}+\frac{123}{999}\right).0=0\)
(1/99+12/999+123/999).(1/2-1/3-1/6)
( 1/99 + 12/999 + 123/999 ) . ( 1/2 - 1/3 - 1/6 )
= ( 1/99 + 12/999 + 123/999 ) . 0
= 0 nha bn
q=(1/99+12/999+123/999)*(1/2-1/3-1/6)
q = (1/99+12/999+123/999)*(1/2-1/3-1/6)
= (1/99+12/999+123/999) * 0
= 0
Q= (1/99+12/999+123/999)(1/2-1/3-1/6)
\(Q=\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right).\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\))
\(Q=\left(\frac{1}{99}+\frac{12}{999}+\frac{123}{999}\right).0=0\)
Tính giá trị của biểu thức: Q =\((\dfrac{1}{99}+\dfrac{12}{999}+\dfrac{123}{999})\cdot(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{1}{6})\)
Q = (1/99 + 12/999 + 123/999) x (1/2 - 1/3 - 1/6)
Q=(1/99+12/999+123/999)x(1/6-1/6)
Q=(1/99+12/999+123/999)x0
Q=0
học tốt!
A=(1/99+12/999+123/999)x(1/2-1/3-1/6) = ?
A=(1/99+12/999+123/999)x(1/2-1/3-1/6)
=(1/99+12/999+123/999)x(3/6-2/6-1/6)
=(1/99+12/999+123/999)x0
=0