1.若a-b/b=3/5,则a/b=_____
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/25 12:43:17
1.若a-b/b=3/5,则a/b=_____
2.若2x-5y=0,则y:x=_____
3.若点P在线段AB上,点Q在线段AB的延长线上,AB=10,AP/BP=AQ/BQ=3/2,求线段PQ的长?
二楼的同学…
10/BP -1 = 10/BQ + 1 = 3/2 这一步是怎么做出来的?
不好意思 我比较笨
2.若2x-5y=0,则y:x=_____
3.若点P在线段AB上,点Q在线段AB的延长线上,AB=10,AP/BP=AQ/BQ=3/2,求线段PQ的长?
二楼的同学…
10/BP -1 = 10/BQ + 1 = 3/2 这一步是怎么做出来的?
不好意思 我比较笨
1:
a-b/b = a/b - 1 = 3/5
a/b = 8/5
2:
2x = 5y
y:x = 2/5x:x = 2:5
3:
由题意
AQ = AB + BQ
AP = AB - PB
AP/BP = AQ/BQ = 3/2
所以
10/BP -1 = 10/BQ + 1 = 3/2
PB = 4
BQ = 20
PQ = PB + BQ = 4 + 20 = 24
a-b/b = a/b - 1 = 3/5
a/b = 8/5
2:
2x = 5y
y:x = 2/5x:x = 2:5
3:
由题意
AQ = AB + BQ
AP = AB - PB
AP/BP = AQ/BQ = 3/2
所以
10/BP -1 = 10/BQ + 1 = 3/2
PB = 4
BQ = 20
PQ = PB + BQ = 4 + 20 = 24
1.已知a-b=5,ab=3,则(a+b)(b-1)=_____.
1.若实数a、b满足a+b=2,则3^a+3^b的最小值是_____.
当a=-5,b=-3又3/1时,(1)a-b=_____.(2)-a-b=_____.(3)-a-(-b)=_____.
一道数学题:已知:3a-b/3=2a+c/5=2b+c/7,则a:b:c=_____:_____:_____
若实数a,b满足a²+ab-b²=0,则b=_____.
若3a²+2|b-1|=0,则a=_____,b=____
若a>1,b>0,且a^b+a^-b=2√2,则a^b-a^-b的值等于_____
若方程2a+1的绝对值加上(3b-5)的平方,则3a+b=_____
若a/b=2 则a*a-ab+b*b/a*a+b*b等于?
若a/5=b/3=c/4≠0,则(a+b+c)/b=_____,(a+2b+3c)/(3a+b+2c)=_______
若a,b满足|a+5b-2|+(a+b-6)²=0,求代数式(a-3b)(a+2b)-(a+5b)(a+3b)
若最简二次根式:b次方根根号下a+b和根号下3a-2b是同类二次根式,则a=_____,b=_____