Câu hỏi: tính giá trị biểu thức
H = [ m : 1 - m * 1 ] : [ m * 1991 + m + 1 ]
Trả lời: H = [ m : 1 - m * 1 ] : [ m * 1991 + m + 1 ]
= H = [ m - m ] : [ m * 1991 + m + 1 ] = H = 0 : [ m * 1991 + m + 1 ] = 0.
\(H=\left(m-m\right):\left(m.1991+m+1\right)\)
\(H=0:\left(m.1991+m+1\right)\)
\(H=0\)
H = ( m : 1 - m x 1 ) : ( m x 1991 + m + 1 )
= ( m - m ) : ( m x 1991 + m + 1 )
= 0 : ( m x 1991 + m + 1 )
= 0.
H=\(\frac{\left(\frac{m}{1}-m.1\right)}{\left(m.1991+m+1\right)}\)
\(H=\frac{\left(m-m\right)}{\left(m.1991+m+1\right)}\)
\(H=\frac{0}{\left(m.1991+m+1\right)}\)
\(H=0\)