(3n+5)chia hết cho(3n+2)
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Bí quyết là lên chỗ nào đọc có dấu sắc là trọng âm ở đó. Em học lớp 6 áp dụng công thức này siêu Ok luôn ạ
As you know, community activities are convenient activities that help people develop better and become more mature, and that's why last year I participated in some community activities. Firstly, I went to the orphanage to help children without families, I cooked charity meals for the children, which showed my love for the children and the children were so happy when they had the meals I cooked. Then, I also taught them some lessons in math and English to help them gain better knowledge. Moreover, I also went to nursing homes, played, and talked with the elderly to help them be happier and less lonely. Volunteering helps me better, develop myself, know more about what is volunteering, and helps the community become united. This year, I think I will join some clean-up activities to do some activities such as: picking up litter in the streets and planting trees.
;-; ổn không
(3n + 5) ⋮ (3n + 2) Đk n ≠ - \(\dfrac{2}{3}\)
3n + 2 + 3 ⋮ 3n + 2
3 ⋮ 3n + 2
3n + 2 \(\in\) Ư(3) = {-3; -1; 1; 3}
Lập bảng ta có:
Theo bảng trên ta có:
n \(\in\) { - \(\dfrac{5}{3}\); - 1; - \(\dfrac{1}{3}\); \(\dfrac{1}{3}\)}
đang tiếng anh mà