Cho△ABC,I là giao điểm của 3 đường phân giác.Qua I vẽ đường thẳng vuông góc với CI cắt AC,BC lần lượt tại M,N.Chứng minh:

a,△AIM đồng dạng với △ABI

b,\(\dfrac{AM}{BN}=\left(\dfrac{AI}{BI}\right)^2\)

Cho △ABC nhọn,các đường cao BM,CN.Lấy H,K lần lượt thuộc tia đối của NC và MB sao cho góc AHB=góc AKC=90*.Chứng minh:

a,AM.AC=AN.AB

b,AH²=AN.AB

c,AH=AK.

Giải pt:

a,(x^2+x-2)(x^2-9x+18)=34

b,(x-5)^5+(x+3)^5=242(x+1)

Giải bài này giúp mk vs ạ!!!!

Ủa sao ko có đầu bài zậy!!!

21. When Kane (come) ……comes………….tonight, we(play) ………will be playing……………BIA together.

22. My parents(visit)…………will visit…………… Japan next week

23. Daisy(sit)…………………will be sitting……….. on the train at 8.30am tomorrow.

24. He ( not play)……………won't be playing…………. with his son at 8 o’clock tonight.

25. He(work)…………will be working…………… at this moment tomorrow.

26. This time next month I (live) ……will be living…………………… in Dubai.

27. At 7.30 AM tomorrow I (eat) ………will be eating…………….. breakfast with my friends.

28. She (study) ……………will study…………at home tonight.

29. (Jimmy/wait) …………Will Jimmy be waiting………………. at the cinema when he arrives?

30. (He/visit) ………Will he visit………….. his aunt again next week?

31. They are staying at the hotel in London. At this time tomorrow, they (travel) ……will be travelling………………..in Vietnam.

32. When they (come)………come…………. tomorrow, we (swim)…will be swimming…………….. in the sea.

33. My parents (not visit)…………won't visit……… Europe next week.

34. Daisy (sit) …………Will Daisy be sitting………..on the plane at 9 am tomorrow?

35. At 8 o'clock this evening my friends and I (watch)……will be watching……………. a famous film at the cinema.

36. She (play) …………Will she be playing…………with her son at 7 o'clock tonight?

37. He (not work)……………will not be working…………… at this moment tomorrow.

38. They (make)………will be making…………….. their presentation at this time tomorrow morning.

39. I think he (not come)………won't come…………. back his hometown.