Mathematics
Senior High
Resolved
この計算過程をおしえてください
S(x) ≤
= 1 となればよいので
2
1½ ½-(4-1/½ x ) (10 — 1/3 x) ≤ 14/1
(12-x) (30-2x) ≦ 8
x2-27x+176 ≦ 0
(x-1)(x-16) ≦ 0
よって 11 ≦x≦16
③ より 11 ≦x≦12
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