Question

11．已知計(jì)算規(guī)則$|\begin{array}{l}{a}&\\{c}&reairmq\end{array}|$=ad-bc，則$|\begin{array}{l}{-4}&{-2}\\{3}&{-1}\end{array}|$=10．

Answer 1

分析 根據(jù)計(jì)算規(guī)則$|\begin{array}{l}{a}&\\{c}&ymcdya9\end{array}|$=ad-bc，把$|\begin{array}{l}{-4}&{-2}\\{3}&{-1}\end{array}|$轉(zhuǎn)化成有理數(shù)的四則運(yùn)算進(jìn)行計(jì)算即可．

解答 解：∵$|\begin{array}{l}{a}&\\{c}&xwvb9bf\end{array}|$=ad-bc，
∴$|\begin{array}{l}{-4}&{-2}\\{3}&{-1}\end{array}|$=（-4）（-1）-（-2）×3
=4+6
=10，
故答案為10．

點(diǎn)評(píng) 本題考查了有理數(shù)的混合運(yùn)算，把一種新運(yùn)算轉(zhuǎn)化成有理數(shù)的四則運(yùn)算是解題的關(guān)鍵．