·找数规律-1/2,1/3,-1/10,1/15,-1/26,1/35,...第七数为( 谢

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·找数规律-1/2,1/3,-1/10,1/15,-1/26,1/35,...第七数为( 谢

·找数规律-1/2,1/3,-1/10,1/15,-1/26,1/35,...第七数为( 谢
·找数规律-1/2,1/3,-1/10,1/15,-1/26,1/35,...第七数为(

·找数规律-1/2,1/3,-1/10,1/15,-1/26,1/35,...第七数为( 谢
-1/50
-1/2=-1/(1*1+1)
1/3=1/(2*2-1)
-1/10=1/(3*3+1)
1/15=1/(4*4-1)
...
1/35=1/(6*6-1)
-1/50=-1/(7*7+1)

-1/58
-1/10=-1/(2+8)
-1/26=-1/(10+16)
-1/58=-1/(26+32)
1/3=1/1*3
1/15=1/3*5
1/35=1/5*7