已知x+1/2=y+3/4=x+y/5,则3x+2y+1/x+2y+3=?用2元1次方程解
问题描述:
已知x+1/2=y+3/4=x+y/5,则3x+2y+1/x+2y+3=?用2元1次方程解
答
x+1/2=y+3/4 x+1/2=x+y/5
解以上方程组,得x=11/4,y=5/2
则3x+2y+1/x+2y+3
=3*11/4+2*5/2+1/(11/4)+3
=9+4/11看看这个,这才是专业x+1/2=y+3/4x+1/2=x+y/5 解以上方程组,得x=11/4,y=5/2则3x+2y+1/x+2y+3=3*11/4+2*5/2+1/(11/4)+3=9+4/11 ,不是对你说的,对上吗啦先生说的