负2n-【3n-1】等于 a-【5a-3b】加【2b减a】等于 1减【2a-1】-【3a加3】等于负2n-【3n-1】等于a-【5a-3b】加【2b减a】等于1减【2a-1】-【3a加3】等于合并同类项
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负2n-【3n-1】等于a-【5a-3b】加【2b减a】等于1减【2a-1】-【3a加3】等于负2n-【3n-1】等于a-【5a-3b】加【2b减a】等于1减【2a-1】-【3a加3】等于合并同类项负
负2n-【3n-1】等于 a-【5a-3b】加【2b减a】等于 1减【2a-1】-【3a加3】等于负2n-【3n-1】等于a-【5a-3b】加【2b减a】等于1减【2a-1】-【3a加3】等于合并同类项
负2n-【3n-1】等于 a-【5a-3b】加【2b减a】等于 1减【2a-1】-【3a加3】等于
负2n-【3n-1】等于
a-【5a-3b】加【2b减a】等于
1减【2a-1】-【3a加3】等于
合并同类项
负2n-【3n-1】等于 a-【5a-3b】加【2b减a】等于 1减【2a-1】-【3a加3】等于负2n-【3n-1】等于a-【5a-3b】加【2b减a】等于1减【2a-1】-【3a加3】等于合并同类项
负2n-【3n-1】
=-2n-3n+1
=-5n+1
a-【5a-3b】加【2b减a】
=a-5a+3b+2b-a
=-5a+5b
1减【2a-1】-【3a加3】
=1-2a+1-3a-3
=-5a-1
负2n-【3n-1】等于 a-【5a-3b】加【2b减a】等于 1减【2a-1】-【3a加3】等于负2n-【3n-1】等于a-【5a-3b】加【2b减a】等于1减【2a-1】-【3a加3】等于合并同类项
已知等差数列{An},A的n+2=2A的n+1-3N+1,则第5项A的下标5等于多少.
若a,b为非负整数,n为正整数.且n大于等于3,若n[2a+(n-1)b]=17²×2.求a b n.若a,b为非负整数,n为正整数.且n大于等于3,若n[2a+(n-1)b]=17²×2.求a b n.请专家解答.
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