3/14X[7-4/(2/15+2/3)]3/14和 7-4/ /是除号 (2/15+2/3) /是分数线
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3/14X[7-4/(2/15+2/3)]3/14和7-4//是除号(2/15+2/3)/是分数线3/14X[7-4/(2/15+2/3)]3/14和7-4//是除号(2/15+2/3)/是分数线3/
3/14X[7-4/(2/15+2/3)]3/14和 7-4/ /是除号 (2/15+2/3) /是分数线
3/14X[7-4/(2/15+2/3)]
3/14和 7-4/ /是除号 (2/15+2/3) /是分数线
3/14X[7-4/(2/15+2/3)]3/14和 7-4/ /是除号 (2/15+2/3) /是分数线
3/14X[7-4/(2/15+2/3)]
=3/14X[7-4/(2/15+10/15)]
=3/14X[7-4/(4/5)]
=3/14X(7-5)
=3/14X2
=3/7
*-----------------------------------------------*| 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 ||
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程
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)
[(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)]
matlab解决约束非线性规划问题myfun.mfunction f=myfun(x)f=x(1)*x(13)+x(2)*x(14)+x(3)*x(15)+x(25)+1.697*(x(4)*x(16)+...x(5)*x(17)+x(6)*x(18)+x(26))+0.575*(x(7)*x(19)+x(8)*x(20)...+x(9)*x(21)+x(27))+0.723*(x(10)*x(22)+x(11)*x(23)+x(12)*x(24));
matlab解决约束非线性规划问题myfun.mfunction f=myfun(x)f=x(1)*x(13)+x(2)*x(14)+x(3)*x(15)+x(25)+1.697*(x(4)*x(16)+...x(5)*x(17)+x(6)*x(18)+x(26))+0.575*(x(7)*x(19)+x(8)*x(20)...+x(9)*x(21)+x(27))+0.723*(x(10)*x(22)+x(11)*x(23)+x(12)*x(24));
分解因式:x^2-7x+62.x^2+5x-363.x^2-12x+204.x^2-3x-215.x^2-15x+86.x^2+x-127.x^2+8x+78.x^2+4x-129.x^2+10x+1610.x^2-5x-14
[(1+x)^20+(1+x)^19+(1+x)^18+(1+x)^17+(1+x)^16+(1+x)^15+(1+x)^14+(1+x)^13+(1+x)^12+(1+x)^11+(1+x)^10+(1+x)^ 9+(1+x)^8+(1+x)^7+(1+x)^6+(1+x)^5+(1+x)^4+(1+x)^3+(1+x)^2+(1+x)]=28.51
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