(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0.34
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(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0.34)=多少,
老兄看不懂!请仔细一点
老兄看不懂!请仔细一点
![(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0.34](/uploads/image/z/19941760-64-0.jpg?t=%EF%BC%881%2B0.23%2B0.34%29x%280.23%2B0.34%2B0.65%29-%281%2B0.23%2B0.34%2B0.65%29x%280.23%2B0.34)
设1+0.23+0.34+0.65=a
原式
=(a-0.65)(a-1)-a(a-1-0.65)
=a^2-a-0.65a+0.65-a^2+a+0.65a
=0.65
原式
=(a-0.65)(a-1)-a(a-1-0.65)
=a^2-a-0.65a+0.65-a^2+a+0.65a
=0.65
简便运算(1+0.12+0.23)X(0.12+0.23+0.34) - (1+0.12+0.34)X(0.12+0.2
一元一次 x-4/1=3x-3/1.0.6(4-x)-5(0.2x+0.34)+5.3=0.2x-3/2+ x+6/5=
0.7x+1.37=1.5x-0.23 x=?
x-1/4.6=0.5/0.23
(1+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34
25/x=5 6.7-x=0.34 3.5x=0.15+x
x+1 x x x+1
4.6分之X减1=0.23分之0.
0.6(4-x)-5(0.2x+0.34)+5.3=0.2x-2/3+ x+5/6=7x-10/3.1/2(3x-5)+
7.5x+1.5x=81 x-0.34x=1.32 19x-3x-4=28 解方程并验算
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
设0.23的循环等于x那么100x等于多少,x等于多少