0.01+0.03+……+0.09+0.11+……0.97+0.99

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0.01+0.03+……+0.09+0.11+……0.97+0.99

0.01+0.03+……+0.09+0.11+……0.97+0.99
0.01+0.03+……+0.09+0.11+……0.97+0.99

0.01+0.03+……+0.09+0.11+……0.97+0.99
0.01+0.03+……+0.09+0.11+……0.97+0.99
=(0.01+0.99)*50/2
=25

0.01+0.03+……+0.09+0.11+……0.97+0.99
=(0.01+0.03+..+0.09) + [(0.1)5 + (0.01+0.03+..+0.09)] +..+ [(0.9)5+(0.01+0.03+..+0.09)]
= 9(0.01+0.03+..+0.09) + (0.1+0.2+..+0.9)5
= 9(0.1)5/2 + (4.5)5

全部展开

0.01+0.03+……+0.09+0.11+……0.97+0.99
=(0.01+0.03+..+0.09) + [(0.1)5 + (0.01+0.03+..+0.09)] +..+ [(0.9)5+(0.01+0.03+..+0.09)]
= 9(0.01+0.03+..+0.09) + (0.1+0.2+..+0.9)5
= 9(0.1)5/2 + (4.5)5
=2.25+25.5
=27.75

收起

4.95

0.01+0.03+……+0.09+0.11+……0.97+0.99
=(0.01+0.99)+(0.03+0.97)+(0.05+0.95)+......+(0.49+0.51)=25