已知a,b,c,满足a²-8b=-23,b²+2c=14,c²-6a=-17,求a+b+c
已知a、b、c满足a²+2b=7,b-2c=1,c²-6c=17,求a+b+c的值
已知实数a、b、c满足1/2|a-b|+根号2b+c+c²-c+1/4=0,求a(b+c)的值
已知a,b,c满足1\2|a+b|+√(2b+c)+c²+1\4-c=0,求a(b+c)的值
已知非零实数a、b、c满足a+b+c=0 求[(a-b)/c+(b-c)/a+(c-a)/b][c/(a-b)+a/(b
已知实数a,b,c,满足a+b+c=10,且1/(a+b)+1/(b+c)+1/(b+c)=14/17,求a/(b+c)
已知a,b,c,满足绝对值a-2+√a-2b+c+c²-c+1/4=0求±√a+b+c
已知(b+c)/(a)=(c+a)/(b)=(a+b)/(c) 求(a+b)/(c)
已知实数abc满足a+b+c=10 1/(a+b)+1/(b+c)+1/(a+c)=14/17 求a/(b+c)+b/(
已知有理数a,b,c满足|a-b-2|+(3a-6b-7)²+|3b+3c-4|=0,求:(-3ab)(-a&
已知a,b,c满足(a+1)²+(2b-3)²+|c-1|=0,求3c分之ab+b分之a-c的值
已知a,b,c满足(a-1)²+5√b-5a+|a-b+c+1|=0,求a+b+c的算术平方根
一道数学题:已知△ABC的三边长a,b,c满足a²+b²+2c²=4a+6b+8c-21,