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幼苗
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由y=ax+b与y=(5/4)x+95/4平行,
∴a=5/4,得y=(5/4)x+b,
将(-1,-25)代入:
-25=-5/4+b,b=-95/4
得:y=(5/4)x+95/4.
当y=0,x=-19,∴A(-19,0)
当x=0,y=95/4,∴B(0,95/4)
∵y=(5/4)x+95/4
=(5x+95)/4
当5x+95是4的整倍数时,
即x=-3,-7,-11,-15,-19时
y=20,15,10,5,0
共有5个点(-3,20)(-7,15)(-11,10)(-14,5)(-19,0).
1年前
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