∵ a b = c d = e f = 5 7 ∴ a b = 2c 2d = 3e 3f ∴ a+2c+3e b+2d+3f = 5 7 .
(x+1)^5=ax^5+bx^4+cx^3+dX^2+ex+f,求a+b+c+d+e+f,b+c+d+e,a+c+e
已知a/b=c/d=e/f=2/3(b+d+f≠0),求(a+c+e)/(b+d+f)的值.
用行列式性质证明| B+C C+A A+B | | A B C || D+E E+F F+D | =2 | D E F
a、c、d、e、f是六个有理数,关且b/a=2/9,c/b=3/8,d/c=4/7,e/d=5/6,f/e=6/5,则a
已知a/b = c/d = e/f= 3/4 求2a+3c+5e
已知a/b=c/d=e/f=3/4,求(2a+3c+5e)/(4b+6d+10f)的值
已知a/b=c/d=e/f=4/5,求2a+3c-5e/4b+6d-10f的值
已知a/b=c/d=e/f=5/7,求下列各式的值 (1) a-c/b-d; (2) a-c+3e/2b-d+3f.
已知有A,B,C,D,E,F,取值1,2,3,4,5,6;则S=|A-B|+|B-C|+|C-D|+|D-E|+|E-F
(x-3)^5=ax^5+bx^4+cx^3+dx^2+ex+f ,则a+b+c+d+e+f= ,b+c+d+e= .
已知a/b=c/d=e/f=2/3,则a+2c-3e/b+2d-3f 值为多少
若a/b=c/d=e/f=2/3,求2a-c+3e/2b-d+3f的值
|