Tìm số nguyên x,y: 42-3ly-3l=4(2012-x^4)

Giải giúp mình các bạn giỏi toán

giúp mình bài 2 với các bạn ơi!!

(4x-5) chia hết (x-1) á,giúp vs ạ gấp lắm lun :(((

Cho tam giác ABC, trên cạnh Ab Lấy M sao cho AM = 2 BM, Trên cạnh AC lấy N sao cho AN = 2/3 NC. Biết diện tích tứ giác MNCB lớn hơn diện tích tam giác AMN là 24 cm2. Tính diện tích tam giác ABC

bài 3 tính hợp lí ạ ai giúp em với !!!

CMR: 1.3.5...(2n-1)/(n+1)(n+2)(n+3)...2n=1/2 mũ n

IV.WRITTING: Rewrite the second sentence: 1.A girl is now in hospital . She was injured in the accident. → The girl who …………………………………………………. 2. That football match was disappointing to us. →We were ………………………………………………………. 3. His family is very poor. However, he is the best student of my class. →Although ……………………………………………………… 4.My brother took a girl to hospital last night. Do you know her? →Do you know ………………………………………………….? 5.His father took care of me when I was four years old. →His father looked………………………………………………. 6.Why don’t we tell the teacher about the problem? →I think we ……………………………………………………… 7.Minh is very friendly. He took part in the meeting. →Minh, who……………………………………………………… 8.She must stay in bed because of her illness. →Because…………………………………………………………

1."Have you seen John?" "No.But he______ be studying in the library A.will B.should C.needn't D.may 2.As I won't be at home tonight , I ______ my homework during my lunch break A.need to do B.have to do C.can do D.mightn't 3.Passengers ______ somke until the signs have been switched off. A.mustn't B.can't C.needn't D.mightn't

c/tỏ rằng 100 số hạng đầu tiên của dãy sau nhỏ hơn 1/4 1/5, 1/45, 1/117, 1/221, 1/357,...