hlep me plsss
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Bài 2:
a: 1378; 7850; 4832; 3720; 7920
b: 7850; 4785; 3720; 7920
c: 3699; 4329; 4785; 3720; 7920
2 have been reading - haven't finished
3 have gone
4 am going to have
5 have washed
6 have broken
7 add - mix
8 have used
9 have lived
10 is always doing
11 am going
12 has taught
13 have already bought
14 always meet
1 She advised him to go on holiday when the weather got warmer
2 She warned them to keep out of that room at all time
3 He reminded me to post those letter
4 He asked them not to go into his study
5 I told him not to wait for me
7 She advised him not to go on holiday yet
8 She warned them against entering that room
^A =130
^B =130
mà 2 góc này ở vị trí sole trong
⇒a//y(1)
^O=180⇒^O1=180-130
⇒^O1=50
Mà Ox là tia phân giác ⇒ ^O1=^O2=50
⇒^O2=B=50
Mà 2 góc này ở vị tri sole trong
⇒y//b(2)
Từ (1)(2)⇒a//b
\(P=x^4+2x^2+1+x^4+2x^3+x^2-3\)
\(P=2x^4+2x^3+3x^2-2\)
\(P=x^2\left(2x^2+2x+3\right)-2=\dfrac{1}{2}x^2\left[\left(2x+1\right)^2+5\right]-2\ge-2\)
\(P_{min}=-2\) khi \(x=0\)
a) so le trong
b) đồng vị
c) trong cùng phía
d) so le trong
e) kề bù