判断级数敛散性1-1/2!+1/3-1/4!+1/5-···

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判断级数敛散性1-1/2!+1/3-1/4!+1/5-···判断级数敛散性1-1/2!+1/3-1/4!+1/5-···判断级数敛散性1-1/2!+1/3-1/4!+1/5-···奇数项1,1/3,1

判断级数敛散性1-1/2!+1/3-1/4!+1/5-···
判断级数敛散性1-1/2!+1/3-1/4!+1/5-···

判断级数敛散性1-1/2!+1/3-1/4!+1/5-···
奇数项1,1/3,1/5,……>1/2+1/4+1/6+……=1/2(1+1/2+1/3+……)发散
偶数项1/2!+1/4!+1/6!……