14/11/18 23:00:17.20
>>275
f'(x)＝(x－1)(6x^4＋6x^3＋6x^2＋6x＋8)
＝(x－1)(3x^4＋3(x^2＋1)(x＋1)^2＋5)
3x^4＋3(x^2＋1)(x＋1)^2＋5＞0
くらいかな
14/11/18 23:00:17.20
>>275
f'(x)＝(x－1)(6x^4＋6x^3＋6x^2＋6x＋8)
＝(x－1)(3x^4＋3(x^2＋1)(x＋1)^2＋5)
3x^4＋3(x^2＋1)(x＋1)^2＋5＞0
くらいかな
14/11/18 23:00:17.20
>>275
f'(x)＝(x－1)(6x^4＋6x^3＋6x^2＋6x＋8)
＝(x－1)(3x^4＋3(x^2＋1)(x＋1)^2＋5)
3x^4＋3(x^2＋1)(x＋1)^2＋5＞0
くらいかな