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gọi số tiền ông nam gửi vào ngân hàng là a (a>0)
TBR: a + 2%a = 16728
a + 0,02a=16728
1,02a=16728
a=16400
vậy số tiền ông nam gửi vào ngân hàng là 16400
Answer:
a)
Có:
\(15=1.15=\left(-1\right).\left(-15\right)=3.5=\left(-3\right).\left(-5\right)\)
| x-3 | 1 | 15 | -1 | -15 | 3 | 5 | -3 | -5 |
| y+1 | 15 | 1 | -15 | -1 | 5 | 3 | -5 | -3 |
| x | 4 | 18 | 2 | -12 | 6 | 8 | 0 | -2 |
| y | 14 | 0 | -16 | -2 | 4 | 2 | -6 | -4 |
b)
Có:
\(M=1+3+3^2+3^3+3^4+...+3^{98}+3^{99}+3^{100}\)
\(=\left(1+3\right)+\left(3^2+3^3+3^4\right)+...+\left(3^{98}+3^{99}+3^{100}\right)\)
\(=4+3^2.\left(1+3+3^2\right)+...+3^{98}.\left(1+3+3^2\right)\)
\(=4+3^2.13+3^{98}.13\)
\(=4+13.\left(3^2+...+3^{98}\right)\)
Vậy M chia 13 dư 4
Có:
\(M=1+3+3^2+3^3+3^4+...+3^{99}+3^{100}\)
\(=1+\left(3+3^2+3^3+3^4\right)+\left(3^5+3^6+3^7+3^8\right)+...+\left(3^{97}+3^{98}+3^{99}+3^{100}\right)\)
\(=1+3.40+3^5.40+...+3^{97}.40\)
\(=1+40.\left(3+3^5+...+3^{97}\right)⋮40\)
Mà \(40\left(3+3^5+...+3^{97}\right)⋮40\)
Vậy M chia 40 dư 1
\(\text{1. What's time is it?
2. What do they do in the evening?}\)
\(\text{3. What time does your mother get up in the morning?
4. When do we have Math?
}\)
\(\text{5. Who does the housework everyday?}\)
1,What is she doing with her food
2. What time does your class start ang end in the afternoon
3. Where is your father work
Câu 1 sai,mik sửa luôn rồi đấy k mik nha
Mandy have more than Adeline:
90 - 40 = 50 ("money unit")
At first, Adeline had:
50 : (7 - 3) x 3 = 37,5 ("money unit")
At first, Mandy had:
50 : (7 - 3) x 7 = 87,5 ("money unit")
Answer: Adeline: 37,5 "money unit"
Mandy: 87,5 "money unit"