题目是不是
若│x-1 1/2| |x-3/4 4 -2│=9 x的值为多少?
根据│a b│ │c d│=ad-bc
│x-1 1/2| |x-3/4 4 -2│=(x-1)(4-2) -1/2(x-3/4)=2x-2-1/2x+3/8=3/2x-13/8
│x-1 1/2| |x-3/4 4 -2│=9 x
so 3/2x-13/8=9 x
x=-13/60
题目是不是
若│x-1 1/2| |x-3/4 4 -2│=9 x的值为多少?
根据│a b│ │c d│=ad-bc
│x-1 1/2| |x-3/4 4 -2│=(x-1)(4-2) -1/2(x-3/4)=2x-2-1/2x+3/8=3/2x-13/8
│x-1 1/2| |x-3/4 4 -2│=9 x
so 3/2x-13/8=9 x
x=-13/60