O polinômio f(x) = x⁵ - x³ + x² + 1 , quando dividido por q(x) = x³ - 3x + 2 deixa resto r(x). Sabendo disso, o valor numérico de r(-1) é

O valor de (cos 165º + sen 155º + cos 145º - sen 25º + cos 35º + cos 15º ) é

Sabendo que “c” e “d” são números reais, o maior valor de “d” tal que a função !$ f : \mathbb {R} \rightarrow \mathbb {R} !$ definida por !$ f(x) = \begin{cases} -x + c, \ para \ x \ge d \\ x^2 - 4x + 3, \ para \ x < d \end{cases} !$ seja injetora é

O fosgênio é um gás extremamente venenoso, tendo sido usado em combates durante a Primeira Guerra Mundial como agente químico de guerra. É assim chamado porque foi primeiro preparado pela ação da luz do sol em uma mistura dos gases monóxido de carbono (CO) e cloro (Cl₂), conforme a equação balanceada da reação descrita a seguir: CO (g) + Cl₂ (g) → COCl₂ (g).

Considerando os dados termoquímicos empíricos de energia de ligação das espécies, a entalpia da reação de síntese do fosgênio é

Dados:

Um cone de revolução tem altura 4 cm e está circunscrito a uma esfera de raio 1 cm. O volume desse cone (em cm³) é igual a

Assinale a alternativa em que o vocábulo grifado está no sentido denotativo.

Na figura abaixo temos uma espiral formada pela união de infinitos semicírculos cujos centros pertencem ao eixo das abscissas. Se o raio do primeiro semicírculo (o maior) é igual a 1 e o raio de cada semicírculo é igual à metade do semicírculo anterior, o comprimento da espiral é igual a

O ácido clorídrico (HCl) reage com alguns metais. Ao reagir com o magnésio metálico (Mgº), forma como produtos um gás inflamável/explosivo e um sal. Os nomes destes produtos formados são, respectivamente:

As substâncias ozônio (O₃); dióxido de carbono (CO₂); dióxido de enxofre (SO₂); água (H₂O) e cianeto de hidrogênio (HCN) são exemplos que representam moléculas triatômicas. Dentre elas, as que apresentam geometria molecular linear são, apenas,

Dados: ₁H¹; ₆C¹²; ₈O¹⁶; ₁₆S³²; ₇N¹⁴

Leia o texto a seguir e responda a questão.

Military Officers Face a New Evaluation

Gen. Martin E. Dempsey, the chairman of the Joint Chiefs of Staff, is leading important changes following recent scandals involving high-ranking officers. This is part of training and development programs for generals and admirals. They will include new courses to train the security detail, executive staffs and even the spouses of senior officers.

Saying he was disturbed about the misconduct issues, General Dempsey said that evaluations of top officers needed to go beyond the traditional assessment of professional performance by superior officers alone. He said that he had decided the changes were necessary “to assess both competence and character in a richer way”.

“You can have someone of incredible character who can’t lead their way out of a forward operating base because they don’t have the competence to understand the application of military power, and that doesn’t do me any good”, General Dempsey said. “Conversely, you can have someone who is intensely competent in the skills of the profession, but doesn’t live a life of character. And that doesn’t do me any good.”

General Dempsey said that regular professional reviews would be transformed from top-down assessments to the kind of “360-degree performance evaluation”, which includes feedback from subordinates, peers and superiors. For the new training programs, he said that while it may be impossible to prevent infractions, “most officers need to be reminded of the rules and regulations on a routine basis”.

Teams of inspectors will observe and review the procedures of commanders and their staffs. The inspections will not be punitive, but will provide a “periodic opportunity for general officers to understand whether, from an institutional perspective, we think they are inside or outside the white lines”, he said. In addition, new programs will be instituted to ensure that a commander’s staff, and a spouse, are fully aware of military regulations.

“In my 39 years in the military, I have learned that you are not a profession just because you say you are. You have to earn it and re-earn it and re-evaluate it from time to time”, General Dempsey said.

Adapted from www.nytimes.com/2013/04/14/us

According to the Macmillan English Dictionary Online, the word issue has the following definitions. Read them and answer the question below.

1. a problem that needs to be considered.
2. a magazine that is published at a particular time.
3. a set of things that are available to people at a particular time.
4. (formal) the act of officially giving something to someone.
5. (legal) someone’s children.

According to the text, which definition above corresponds to issue in the sentence “...he was disturbed about the misconduct issues...” (paragraph 2)?