Câu 7. Họ nguyên hàm của hàm số $$f\left(x\right)=2^x$$ là

C. $$F\left(x\right)=\frac{2^x}{\ln2}+C$$

A. $$F\left(x\right)=2^{x\ }+C$$

B. $$F\left(x\right)=\frac{2^{\left(x+1\right)}}{x+1}+C$$

D. $$F\left(x\right)=2^x.\ln2+C$$

Câu 8. Trong không gian Oxyz, cho mặt cầu (S) có tâm $$I\left(1;\ -4;\ 0\right)$$ và bán kính bằng 3. Phương trình của mặt cầu (S) là:

C. $$\left(x-1\right)^2+\left(y+4\right)^{2\ }+z^{2\ }=9$$

A. $$\left(x+1\right)^2+\left(y-4\right)^{2\ }+z^{2\ }=9$$

B. $$\left(x+1\right)^2+\left(y-4\right)^{2\ }+z^{2\ }=3$$

D. $$\left(x+1\right)^2+\left(y-4\right)^{2\ }+z^{2\ }=3$$

Câu 9. Trong không gian $$Oxyz,\ $$ đường thẳng $$d:\ \frac{x-2}{2}=\frac{y+2}{2}=\frac{z}{3}$$ đi qua điểm nào trong cá điểm sau đây?

A. $$B\left(0;\ -6;\ -6\right)$$

Câu 10. Tập nghiệm của bất phương trình $$4^x

D. $$\left(-\infty;\ 0\right)$$

A. $$\left(0;\ +\infty\right)$$

C. $$\left(-\infty;\ 1\right)$$

Quiz_K12_Trắc nghiệm

Authored by Olympia Teachers

Mathematics

12th Grade

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Câu 5. Một nhóm học sinh có 5 học sinh, trong đó có 3 học sinh nữ. Chọn ngẫu nhiên 2 học sinh để tham gia 1 cuộc khảo sát. Tính xác suất để 2 học sinh được chọn đều là nữ.

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