Cho Q' =0 giúp em tìm L gấp ạ sẽ vote 5sao ạ

Cho ∆ABC nhọn có đường cao AH. Gọi I, J lần lượt là trung điểm AB,AC a/ Chứng minh : AH┴IJtại M b/ Chứng minh : MA=MH c/ KẻJK┴BC tại K. Gọi S là trung điểm JK.Chứng minh : C,S,M thẳng hàng Giúp em với các hảo hán em cần gấp lắm

Mn giúp mik với nhanh giúp mik với nha

ai đó giúp mình bài này với, cần gấp lắm ạ:((

Nhanh nhanh nhanh giúp em ạ em cần gấp lắm

problem 2. in an attempt to determine some off-the-job factors that might be indicators of onthe-job effectiveness, a company made a study of 200 of its employees. it was interested in whether the employees had been recognized for superior work by their supervisors within the past year, whether they were involved in community activities, and whether they followed a regular exercise plan. the company found the following: 30 answered "yes" to all three, 50 were recognized and they exercised, 52 were recognized and were involved in the community, 77 were recognized, 37 were involved in the community but did not exercise, 95 were recognized or were involved in the community, 95 answered mathfrak ^ 66 n0^ 97 to all three. (c) how many exercised or were involved in the community? (a) draw a venn diagram that represents this information. (b) how many exercised only

Giúp mk gấp với ạ !! Câu 45-48 ạ

giúp mình câu 3,4 nha mọi người

Giải hộ e với ạ. E cần gấp ạ. E cảm ơn.

Giải thích tại sao Glucozơ và Fructozo không có phản ứng thủy phân ?