y1=1/5+1,y2=2x+1/4,当x为何数时,y1,y2互为相反数?
问题描述:
y1=1/5+1,y2=2x+1/4,当x为何数时,y1,y2互为相反数?
答
1/5+1+(2x+1/4)=0
2x=-1-9/20
x=29/40