已知数a-2与2a-3(1)若这两数互为相反数,则a的倒数是( ),相反数是( )(2)若这两数互为倒数,则a的倒数是( ),相反数是( )(3)弱这两数的绝对值相等,则a的倒数是( ),相反数是( )
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![已知数a-2与2a-3(1)若这两数互为相反数,则a的倒数是( ),相反数是( )(2)若这两数互为倒数,则a的倒数是( ),相反数是( )(3)弱这两数的绝对值相等,则a的倒数是( ),相反数是( )](/uploads/image/z/3690882-18-2.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0a-2%E4%B8%8E2a-3%EF%BC%881%EF%BC%89%E8%8B%A5%E8%BF%99%E4%B8%A4%E6%95%B0%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E5%88%99a%E7%9A%84%E5%80%92%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89%2C%E7%9B%B8%E5%8F%8D%E6%95%B0%E6%98%AF%28+%29%282%EF%BC%89%E8%8B%A5%E8%BF%99%E4%B8%A4%E6%95%B0%E4%BA%92%E4%B8%BA%E5%80%92%E6%95%B0%2C%E5%88%99a%E7%9A%84%E5%80%92%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89%2C%E7%9B%B8%E5%8F%8D%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89%EF%BC%883%EF%BC%89%E5%BC%B1%E8%BF%99%E4%B8%A4%E6%95%B0%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%9B%B8%E7%AD%89%2C%E5%88%99a%E7%9A%84%E5%80%92%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89%2C%E7%9B%B8%E5%8F%8D%E6%95%B0%E6%98%AF%EF%BC%88+%EF%BC%89)
已知数a-2与2a-3(1)若这两数互为相反数,则a的倒数是( ),相反数是( )(2)若这两数互为倒数,则a的倒数是( ),相反数是( )(3)弱这两数的绝对值相等,则a的倒数是( ),相反数是( )
已知数a-2与2a-3
(1)若这两数互为相反数,则a的倒数是( ),相反数是( )
(2)若这两数互为倒数,则a的倒数是( ),相反数是( )
(3)弱这两数的绝对值相等,则a的倒数是( ),相反数是( )
已知数a-2与2a-3(1)若这两数互为相反数,则a的倒数是( ),相反数是( )(2)若这两数互为倒数,则a的倒数是( ),相反数是( )(3)弱这两数的绝对值相等,则a的倒数是( ),相反数是( )
(1)若这两数互为相反数
a-2=-(2a-3)=-2a+3
a=5/3
则a的倒数是(3/5),相反数是(-5/3)
(2)若这两数互为倒数
(a-2)(2a-3)=1
2a²-7a+5=0
(a-1)(2a-5)=0
a=1,a=5/2
则a的倒数是(1或2/5),相反数是(-1或-5/2)
(3)若这两数的绝对值相等
|a-2|=|2a-3|
a-2=2a-3或a-2=-(2a-3)
a=1,a=5/3
则a的倒数是(1或3/5),相反数是(-1或-3/5)
(1)若这两数互为相反数,则a的倒数是( 3/5 ),相反数是( -5/3 )
(2)若这两数互为倒数,则a的倒数是( 1或2/5 ),相反数是( -1或-5/2 )
(3)弱这两数的绝对值相等,则a的倒数是(1或3/5 ),相反数是( -1或-5/3 )
1.
3/5,-5/3
2.
a=5/2或a=1
倒数 2/5 或1
相反数 -5/2或-1
3.
a=1或a=5/3
倒数1或3/5
相反数-1或-5/3
(1)若这两数互为相反数,则a的倒数是(3/5),相反数是(-5/3)
(2)若这两数互为倒数,则a的倒数是(1、2/5),相反数是(-1、-5/2)
(3)弱这两数的绝对值相等,则a的倒数是(1、2/5),相反数是(-1和-5/2)
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