(1+1/3)x=28 (1-2/7)x=40 x-2/5x=36 x+4/7x=55用解方程,
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(1+1/3)x=28(1-2/7)x=40x-2/5x=36x+4/7x=55用解方程,(1+1/3)x=28(1-2/7)x=40x-2/5x=36x+4/7x=55用解方程,(1+1/3)x=2
(1+1/3)x=28 (1-2/7)x=40 x-2/5x=36 x+4/7x=55用解方程,
(1+1/3)x=28 (1-2/7)x=40 x-2/5x=36 x+4/7x=55用解方程,
(1+1/3)x=28 (1-2/7)x=40 x-2/5x=36 x+4/7x=55用解方程,
(1+1/3)x=28
x=28*3/4=21
(1-2/7)x=40
x=40*7/5=56
x-2/5x=36
x=36*5/3=60
x+4/7x=55
x=55*7/11=35
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+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2
解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x-
*-----------------------------------------------*| 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
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求和:Sn=1+3x+5x*x+7x*x*x+……+(2n-1)x^n-1 (x不为0和1)