简算0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99

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简算0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99
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简算0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99
简算0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99

简算0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99
0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99
=1/100*(1+3+5+...+97+99)
=1/100*(1+99)*50/2
=25
0.01+0.03+0.05+…+0.09++0.11+…0.97+0.99
=(0.01+0.99)+(0.03+0.97)+...+(0.49+0.51)
=1*25
=25

(0.01+0.99)*99/2=49.5 答题不易 望采纳谢谢

这是等差数列,公差为2…共有50项…用公式求解(0.01 0.99)/2再×50=50