Giúp e bài 2 vs ah
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17 tháng 10 2023
2: x+13 là bội của x-1
=>\(x+13⋮x-1\)
=>\(x-1+12⋮x-1\)
=>\(x-1\inƯ\left(12\right)\)
mà x-1>=-1(vì x là số tự nhiên)
nên \(x-1\in\left\{-1;1;2;3;4;6;12\right\}\)
=>\(x\in\left\{0;2;3;4;5;7;13\right\}\)
3: 4x+9 là bội của 2x+1
=>\(4x+9⋮2x+1\)
=>\(4x+2+7⋮2x+1\)
=>\(2x+1\in\left\{1;7\right\}\)
=>\(x\in\left\{0;3\right\}\)
DT
Đỗ Thanh Hải
CTVVIP
14 tháng 7 2021
IV
1 do
2 to be
3 was waiting
4 went - wouldn't be
5 were
6 smoking
7 is always leaving
8 to study
9 haven't spoken
10 arrive
V
1 wealthy
2 imagination
3 literately
4 phýical
5 observation
6 Married
7 behavior
8 incredible
9 seniority
10 unbelievable
14 tháng 7 2021
IV
1 do
2 to be
3 was waiting
4 went - wouldn't be
5 were
6 smoking
7 is always leaving
8 to study
9 haven't spoken
10 arrive
V
1 wealthy
2 imagination
3 literately
4 physical
5 observation
6 Married
7 behavior
8 incredible
9 seniority
10 unbelievable
KY
14 tháng 7 2021
I wish the council wasn't demolishing it
If I were good at English, I could become a tour guide
"I will hold an event about skin care next month" Mary said
She was given the book " The fault in our stars " as a birthday gift by him
He wishes he could come to his brother's wedding
He advised me not to longer spend most of time chatting on Facebook.
How long did you start searching for some facts in the past ?
My mother used to for me when I married my wife
She was so frightened that she lost control of her car.
It was such a delicious dessert that I decided to order portion
Because of my sickness, I don't go out
mng giúp mình bài 2 bài 3 bài 4 vs ah
20 tháng 9 2021
Bài 6:
a: Xét ΔAPC có
M là trung điểm của AC
Q là trung điểm của PC
Do đó: MQ là đường trung bình của ΔAPC
Suy ra: MQ//AP
Xét ΔBMQ có
P là trung điểm của BQ
PD//MQ
Do đó: D là trung điểm của BM
Suy ra: DB=DM
is=>was
leave=>will leave
since=>for
difficult than=>more difficult than
have been=>had been
so =>too
endangerment=>endangered