Mathematics Senior High over 2 yearsago

F 内積はどう求めますか？ 教えてください

II 問1 次の文中の C D 中から適するものを選び, その他の a, となる。よって 1辺の長さが1である正四面体OABC を考える。 は 0<x<1を満たす数とし,辺 AB を (1-m) に内分する点をP, 辺BC をæ: (1-m) に内分する点をQとする。 また, OA = d, OB=1,c=aとおく。このとき, cos POQ の値の範囲を求めよう。 を満たす。 次に, OP と は, OP e 0Q |OP|=|0Q| である。 (0) (1-x) a+xb 3 xb + (1-x) c (⑥6) x2-x-1 である。 したがって, これより, 求める値の範囲は ⑨④⑨ E 1 a b = b c = c ₁ a cos ZPOQ (-x² + x − 1) J K TE F には適する数を入れなさい。 1 G <cos ZPOQ≤ 1 o xả + (1-2)ờ TC x2+x+1 G には,下の選択肢 OP OQ (−x² + x + 1) 「B と表せるから H I L M 8 注) 正四面体: regular tetrahedron, 内分する: divide internally -168- F (1 − x) b + x c x2-x+1 の · (−x² − x + 1)

Mathematics Senior High about 3 yearsago

赤く丸をしたbの問題で解答の方に二階微分した後の式がなぜ(-1/4)(-1/4)(H-27)になるのか分かりません。教えてください🙇‍♀️

QA At time t = 0, a boiled potato is taken from a pot on a stove and left to cool in a kitchen. The internal temperature of the potato is 91 degrees Celsius (°C) at time t = 0, and the internal temperature of the potato is greater than 27°C for all times t > 0. The internal temperature of the potato at time t minutes can be modeled by the function H that satisfies the differential equation dH (H- (H-27), where H(t) is dt measured in degrees Celsius and H(0) = 91. (a) Write an equation for the line tangent to the graph of Hat t = 0. Use this equation to approximate the internal temperature of the potato at time t = 3. (b) Use 2017 APⓇ CALCULUS AB FREE-RESPONSE QUESTIONS (a) dH d²H dt² to determine whether your answer in part (a) is an underestimate or an overestimate of the internal temperature of the potato at time t = 3. (c) For t < 10, an alternate model for the internal temperature of the potato at time 7 minutes is the function -= − (G - 27)²/3, where G(t) is measured in degrees Celsius dG G that satisfies the differential equation dt and G(0) = 91. Find an expression for G(t). Based on this model, what is the internal temperature of the potato at time t = 3 ? 564 at (21-27) - == 2-16 To = - = (H(3)-27) 4 -64 = HB)-27 -37 = H (3) (b) _d²fi © 2017 The College Board. Visit the College Board on the Web: www.collegeboard.org. GO ON TO THE NEXT P

Mathematics Senior High almost 9 yearsago

The gigantic corporation had a virtual monopoly over internal commerce. このoverって何ですか？