(-1.23)X(+1/1/3)X(-2.5)X(-1/1/41)···(-1.23)X(+1/1/3)X(-2.5)X(-1/1/41)和(+3/1/3)X(-0.3)X(-11/1/4)X(-1/1/3);还有(-5/7/8)X(-21)-21X(-4/1/8)可不可以简便?如果可以,麻烦列出是怎么简便的..
来源:学生作业学帮网 编辑:学帮网 时间:2024/06/06 02:08:21
(-1.23)X(+1/1/3)X(-2.5)X(-1/1/41)···
(-1.23)X(+1/1/3)X(-2.5)X(-1/1/41)和(+3/1/3)X(-0.3)X(-11/1/4)X(-1/1/3);还有(-5/7/8)X(-21)-21X(-4/1/8)可不可以简便?如果可以,麻烦列出是怎么简便的..
(-1.23)X(+1/1/3)X(-2.5)X(-1/1/41)
=1.23X(4/3)X2.5X(-42/41)
=-(1.23/3)X(4X2.5)X(42/41)
=-0.41X10X(42/41)
=-4.1X(4.2/4.1)
=-4.2
(+3/1/3)X(-0.3)X(-11/1/4)X(-1/1/3)
=-(10/3)X0.3X(45/4)X(4/3)
=-(10/3X0.3)X(45/3)X(4/4)
=-1X15X1
=-15
(-5/7/8)X(-21)-21X(-4/1/8)
=(47/8)X21+21X(33/8)
=21X(47/8+33/8)
=21X(80/8)
=21X10
=210
可以简便,先化为分数,再计算,分子分母有相同的项可以消去
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式:X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X.
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360
(x-1)^3(x+1)(x-2)/(x+4)
x(x+1)(x+2)(x+3)+1 (换元法)
计算 x(x+3)-(x-1)(x-2)
化简:x(2x+1)-x(x-3)
(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)
(x+1)(x+2)(x+3)(x+4)+1(x+1)(x-2)(x+3)(x-4)+25
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(x-1/x+1 - x+1/x-3 )除 2/x²+2x+1
x(x平方-1)+2X平方(X+1)-3X(2X-5)帮个忙
【(Xˇ2-X)/x】 ·【 x/(X+1)】+【(3x+1)】
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
[x(x+1)+x平方(x-1)]+(-3x)
x{x+1}{x-1}}x-2}{x-3}-40