Cho hàm số $f\left(x\right)\ne 0$, $f^{\prime }\left(x\right)=\frac{3x^4+x^2-1}{x^2}{f}^2\left(x\right)$ và $f\left(1\right)=-\frac{1}{3}$. Tính $f\left(1\right)+f\left(2\right)+\mathrm{.\; .\; .}+f\left(80\right)$.

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Biết m là số thực thỏa mãn $S_1={\displaystyle \underset{-2}{\overset{1}{\int }}\left|f\text{'}\left(x\right)\right|dx}=-{\displaystyle \underset{-2}{\overset{1}{\int }}f\text{'}\left(x\right)dx=f\left(-2\right)-f\left(1\right)\Rightarrow }f\left(-2\right)-f\left(1\right)=9\Rightarrow f\left(-2\right)=9+f\left(1\right)=12.$ . Mệnh đề nào dưới đây đúng?
  

• She_______ him when he called her.

• Fill in each numbered blank with one suitable word or phrase
  The last two decades have seen enormous changes in the way people's (1) . . . . . . . are affected, by IT. Twenty years ago, few people had access to a computer whilst today (2). . . . . . . . people use them at work, home or school and use of e-mail and the Internet is an every day event.
  These developments have brought many (3). . . . . . . . to our lives. Email makes communication much easier and more immediate. This has numerous benefits for business, commerce, and education. The World Wide Web means that information on every conceivable subject is now (4). . . . . . . . . . to us. Clearly, for many people this has made life much easier and more convenient.
  However, not all the effects of the new technology have been beneficial. Many people feel that the (5). . . . . . . . use of e-mail is destroying traditional forms of communication such as letter writing, telephone and face-to-face conversation. With ever increasing use of information technology these negative elements are likely to increase in the future.
  Question 4.
  
• Cho và . Tất cả các giá trị của $a$ để là
  
• Tìm tọa độ véc tơ $\overrightarrow{u}$ biết rằng $\overrightarrow{u}+\overrightarrow{a}=\overrightarrow{0}$ và $\overrightarrow{a}=(1;-2;1)$
  
• Cho $\underset{x\to x_0}{\lim }f\left(x\right)=-1$. Tính giá trị $P=\underset{x\to x_0}{\lim }\left[2f^2\left(x\right)+3\right]$
  

• Nếu  thì  bằng

• Chọn đáp án đúng về công nghiệp điện lực:
  
• Cho hàm số y=fx có đồ thị hàm số y=f'x như hình vẽ bên dưới:
  
  Hàm số y=fx+1+x2+2x đồng biến trên khoảng
  

• I _______ understand this letter. Will you translate it for me?