求教,x+5＞-1；4x＜3x-5；7分之1x＜7分之6；-5x＞10.这里有4道题,求大神速速教,

用因式分解法解下列方程(5x-1)(2x+4)=3x+6,求教 *-----------------------------------------------*| 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 || 求教,x+5＞-1；4x＜3x-5；7分之1x＜7分之6；-5x＞10.这里有4道题,求大神速速教, 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X 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 求教一道c语言题,求级数和的近似值!y=x+x*x*x/3*1!+x*x*x*x*x/5*2!+x*x*x*x*x*x*x/7*3!+.令x=0.5,1.0,2.0,3.0,取前十项之和分别计算Y的值. 求教一道c语言题,求级数和的近似值y=x+x*x*x/3*1!+x*x*x*x*x/5*2!+x*x*x*x*x*x*x/7*3!+.令x=0.5,1.0,2.0,3.0,取前十项之和分别计算Y的值. s = 2*sin(x)-sin(2*x)+2/3*sin(3*x)-1/2*sin(4*x)+2/5*sin(5*x)用matlab画图,求教啊 求教 |x-1| 难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6 求教一道高数计算题lim(x→0) (1/(3x^2)-1/x^4 +(1/(x^5))∫<0,x>e^(-t^2)dt)半天算不出来啊!求教! 如下9*9宫图如何填x x x 1 x x x 2 9x x 5 x x x x x 4x 6 8 x x x x x xx x x 7 x x 5 x xx 2 x x 6 x x 8 xx x 3 x x 9 x x xx x x x 5 x 1 6 x 4 x x x 3 x x x x 7 x x x x 2 x x x 求教x*2^x/(2^x-1) 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 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? f(x)=x平方-5x+4,g（x+1）=f（x）那么g（x)=?怎么算呢?虚心求教 [(x+2)/(x+3)-(x+1)/(x+2)+(x+4)/(x+5)-(x+3)/(x+4)]/[(x的平方+7x+13)/(x的平方+8x+15)] 计算:[(x+2)/(x+3) - (x+1)/(x+2) + (x+4)/(x+5) - (x+3)/(x+4) / (x^2 + 7x + 13)/(x^2 + 8x + 15)