Tính nhanh: F= 361 + 355 +...+ 7 + 1 mọi người giải giúp em. Em cảm ơn
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mọi người giải nhanh giúp em,em cảm ơn
24 tháng 10 2021
b: \(6-3\cdot\left(-\dfrac{1}{3}\right)^3-\sqrt{9}\)
\(=6-3-3\cdot\dfrac{-1}{27}\)
\(=3+\dfrac{1}{9}=\dfrac{28}{9}\)
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Đề dài thế này sao giải thích nhanh cho e đc
Part 1
1 C
2 B
3 D
4 C
5 B
6 A
Part 2
1 T
2 F
3 F
4 F
V
1 That old house has just been bought
2 If he doesn't take these pills, he won't be better
3 I suggest taking a train
4 Spending the weekend in the countryside is very wonderful
VT
7
Số số hạng là :
( 361 - 1 ) : 6 + 1 = 61 số hạng
Tổng dãy đó là :
( 361 + 1 ) x 61 : 2 = 11 041
Đáp số : 11 041