答えはn(2n-3)なんですけどどこが間違ってますか？？

11 n 421-25 k=1 2 4x k=1 n(n+リー 21 (4+1) = 1/411/85 = 2n 10 12 2 +1)x1 4n(n+1)-n(n+ 1/2(4m²+4m-10m²-10m) 16m² 2 2 6m 31-3 EDIRI 1

4行目のDuringの意味を教えてください。

Lesson3 5/28/年 Date: 3AS you kngW, ご存知願り the human body consists. of various kinds. 成り立つ いろいろな Kind of~ さまぎ 種類の~ of. Cells. Our bodhes develop from just one fertrhized egg cel. 発達する たった一つの 受橋駅知胞9 The Cell Continues to diride, resulting 分裂する ~という結果を もたらす in a human body which. 不定詞 consists of _about37 trilhon Cells . During the. early Stages of_cdivisSion, ~から成る 約 37兆個の細胞 分裂 each cell Can become any part of the booly. In the later stages) all. cells play certain. Yoles. in the creation ot skin, hair, and bone, to name a few. Once the Cells.. qet their roles, they cannot be sed

赤線の和訳はどうなりますか？hundreds がどのような日本語になるかわかりません。教えていただきたいです🙇‍♂️

ーー 一 こしとにCSICED HUCO St8KCS./1 1S WadS DCCauSe。in tne 19tn century, a只、4 disease nad caused the death of a large number of these animals/ However。in recent earS。 scienistS have_brought a number of these animals from other places to restore their popujafons/Therefore, there were both new and old groupS to compare. Te scientists used GPS technology to track the movements of hundreds of moose ーー ブー一 And Dienorn sheep/Some belonged to older groups that had lived in the west for more nan 200 years, while others were part of newer groups that had recently been introduced ) (he areaノTne result was that almost all the members of older groups migrated at the gnf fme betyeen (he higher and the lower parts of the mountains. However。newer oups usuaJjy moved at the wrong time or did not move at all. In fact。 among animals rf arrjved within the last 10 years。 only 9 percent Were able to make the mo ceSS人月Y. m addirion。 (he scientists recorded how much food was available along the migrati( es af each animal took. They found that animals from older groups chose routes 人 Jarge amounts of food一sometimes traveling great distances between food sourc ever。animals from newer groups only moved to nearby sources Of food that 1 | see. According to (he scientists、this shows that moose and bighorn sheep【 d knowledge of the best routes from older members of their groups。but 避。 St Ci

ごめんなさい。非常に見にくいと思いますが、 (b)の問題で、なぜ②じゃなくて③が正解なのかわからないです。教えてください🙏🙏

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⑶ どなたか教えてください！ お願いします！！

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