Ehime Entrance Mathematics study materials
Ehime Entrance Mathematics study resources

Ehime Entrance Mathematics case studies

Ehime Entrance Mathematics · Put your knowledge to work in context.

愛媛大学の一般選抜で課される数学の筆記試験は、数学を必須または選択科目とする学部・学科の合否を大きく左右する記述式の試験です。本ページは愛媛大学とは関係のない独立した学習用の解説で、試験の性格と対策の組み立て方をまとめたものです。 主な対象は、高等学校を卒業(見込み)の人、または高等専門学校などから志願する人で、数学I・A・II・B、現行課程では数学III・Cまで含めて一通り学習を終えた受験生です。出題は教科書の範囲全体におよび、単独の分野をきれいに切り分けた問題よりも、複数の分野を組み合わせたり誘導を付けたりした設問が中心になります。したがって、公式を暗記して当てはめる力よりも、定義に戻って考え、日本語で筋道を立てて書き切る力が問われます。答案は結論だけでなく、場合分けの条件や定理を用いた理由まで読み取って評価されるため、日頃から「人に読ませる答案」を意識して練習することが近道です。 準備は三段階で考えると進めやすくなります。第一に、教科書の例題と定理の証明を自分の手で再現する。第二に、過去問を時間を計って解き、解けなかった原因を「知識」「方針」「計算」「記述」に分類する。第三に、答案を第三者に読ませ、論理の飛躍や書き漏れを潰す。この順序なら、伸びしろの大きい記述力から先に固められます。試験時間・大問数・配点・選択の有無は年度や学部で変わるため、必ず受験する年度の募集要項と学生募集要項で確認してください。. Topics on this exam: Differentiation and its applications (limits, derivatives, tangents, maxima/minima, curve sketching), Integration and its applications (definite integrals, areas, volumes, equations of curves), Sequences, series and limits (arithmetic/geometric, recurrence relations, mathematical induction, infinite series), Vectors in the plane and in space (dot products, lines, planes, geometric configuration), Trigonometric, exponential and logarithmic functions (equations, inequalities, graphs, related rates), Probability and counting (permutations, combinations, conditional probability, expected value), Complex numbers and the complex plane (polar form, loci, De Moivre, equations), Polynomials, equations and integer properties (factor theorem, rational roots, divisibility, Euclidean algorithm, base representations), and Plane and solid geometry (triangles, circles, congruence/similarity, inscribed solids, coordinate geometry). The Ehime Entrance Mathematics case studies are 5 cases and about 1,891 words.

1

Cone from a Circular Sheet

A metalworker has a circular sheet of radius 10 cm and wants to cut out a sector of angle θ (0<θ<2π), then join the two straight edges to form a cone. The slant height will be 10 cm, and the base radius r will be the arc length divided by 2π, so r = 10θ/(2π)=5θ/π.

377 words, about 2 min
2

Vase Volume: Axis and Fill Height

A potter designs a vase whose side profile, when measured in centimetres, is given by y=4−x^2 for 0≤x≤2, rotated about the y-axis to create a solid of revolution. The base is at y=0 and the rim at y=4.

332 words, about 2 min
3

Accumulating Drug Doses

A hospital prescribes a drug with a 6-hour dosing interval. Each dose is 40 mg, and after 6 hours 25% of the drug present just after the previous dose remains in the bloodstream.

402 words, about 2 min
4

Skew Drone Paths

Two drones move inside a rectangular hangar; coordinates are in metres and time t is in seconds. Drone A has position r A(t)=(1+2t, 4−t, 3+t), and drone B has position r B(t)=(5−t, 1+2t, 2+2t), for t≥0.

352 words, about 2 min
5

Defect Attribution and Screening Cost

A small electronics workshop uses three soldering stations. Station A makes 50% of the boards, station B makes 30%, and station C makes 20%.

428 words, about 2 min