31番が分かりません、、😭😭 ほかも答えと理由合ってますでしょうか😭😭

2 次の英文の下線部には誤っている箇所が1箇所ある。 その番号を選び, 正しい形に直しなさい。 31. The United Nations decided to give food aid to African nations, but problems remain to deal. .at more serious ② 〈名古屋外国語大〉

答え合ってますでしょうか🥲🥲

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証明がこうなる理由を教えてください。

一般項が an=3-4n で表される数列{a} がある。数列{az} の項を,初項か ら2つおきにとってできる数列 a1, A4, A7, また, 初項と公差を求めよ。 は等差数列であることを示せ。

なぜiが消えているのでしょうか？ なぜ4xは実数なのですか、複素数とはなんですか？

(3) (1+xi)+(x+i)2=0

marry の形がわかりません

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答えは35です。至急お願いします。

(a+b+c)” の展開式における次の項の係数を求めよ

微分最大最小

235 正の数 a, b が +6=2を満たす。 (1) a+bの値の範囲を求めよ。 (2) d' + 62 の最大値を求めよ。

識者の方何卒宜しくお願いします

演習 【26-1】 関数 f(x)=x+acosx (a >1) は 0<x<2πにおいて極小値0をと る。この範囲における f(x) の極大値を求めよ. (室蘭工大)

数学に自信のある方 何卒宜しくお願いします

(2)(1) のとき, f(x) に極値があればそれを求めよ. 1 (山梨大) 4 関数 f(x)= -e-ax が x>0 において極値をもつとき,aのとりうる値 x の範囲を求めよ。 thAme (東京電機大) 2 上を占POがPQ=2という関係を保ちながら動く. ま

何もわかるないので詳しく早めに教えてください

正五角形ABCDE の対角線 AC, BD の交点をFとする。 次のことを示せ。 (1) AACDADFC (2) CD = 1, AC = x とすると, xは x:1=1:(x-1) を満たす。 (3) CD:AC=1: 1+√5 2 A B E F C D