chứng minh rằng a^2k -1 chia hết cho 2^k+1 với k nguyên, a lẻ

Giải giúp em với ạ,em cảm ơn !!!

bài 32.............................................................................

Cho điểm => nhanh nha chi tiết nha $\left \{ {{x+y=3} \atop {2x+3y=6}} \right.$

bbài 31 44444444444444444444444444444444444444444444444444

Giải thích và chọn cho mk nha, nếu có công thức thì cho mk xin lun nha! .......................... she can buy everything she likes. A, so rich is she that B, so rrich she is that C, Such rich is she that D, All are right

Giúp mình luôn với ạ vì mình đang cần gấp á, sẽ vote 5 sao nha, cảm ơn mn nhìu^^

8. Please, open the window, ____________ you? A. do B. will C. might D. can’t 9. We ___________ touch since we ____________ school three years ago. A. lost / have left B. have lost / leaveC. have lost/ left D. were losing/had left 10. He lost the race because he __________ petrol on the last lap. A. got out of B. ran out of C. made out of D. put out of 11. She felt a little bit cold, __________ she put on her coat. A. or B. because C. so D. but 12. “Where is the library?”- “It’s __________your right”. A. in B. on C. at D. by 13. “How many products did you sell?”- “ __________ than we had expected”. A. Less B. Lesser C. Few D. Fewer 14. It’s not an easy task. However, please have him __________it. A. do B. to do C. doing D. done 15. It’s often difficult for a young child __________ clothes. A. wearing B. to wear C. putting on D. put on 16. My sister went __________ yesterday. A. to shopping B. shopping C. to shop D. shopped CÁC BẠN LÀM VÀ GIẢI CHI TIẾT HỘ MÌNH VS Ạ

Làm nhanh giùm mình với,ko sao chép trên qanda nha

Vẽ nhân vật anime nam ngầu. 40 điểm nên vẽ đẹp xíu