Em tham khảo nha:
\(\begin{array}{l}2{p_X} + {n_X} = 193\\ \Rightarrow {n_X} = 193 - 2{p_X} = 193 - 2 \times 56 = 81\\{e_X} = {p_X} = 56\\{A_X} = {p_X} + {n_X} = 81 + 56 = 137\end{array}\)
Bạn tham khảo:
$2p+n=193$
Vì $p=56$
$\to 2.56+n=193$
$\to n=81$
$A=81+56=137$
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nhanh giúp em với ạ em sẽ vote 5 sao
1. Làm tròn số 34,9037 đến hàng đơn vị là: A. 34 B. 34,9 C. 35,0 D. 35
All the time he was growing (0) ________, colour did not exist for Londoner Brian Langridge. Brian (1)_______ born with a very rare eye defect, affecting only one in a million people, which meant he could only see things in black and white. Then at the age of 21, he heard about some revolutionary new contact lenses developed (2) _______ British scientists, and he decided to save (3)________ the $600 needed to buy a pair. In (4)________to raise the money, Brian had to (5) _________ overtime in his job at a local supermarket. But he was careful (6) _____ to build his hopes up too high. "The opticians had always told me that nothing could be (7) _____ to help me because I was so severely colour blind," says Brian. "Consequently, I didn’t get too excited about the lenses in (8) ______ they didn’t work for me." He needn’t have worried, though; as soon as he put them on he began to see the world in all its colour. "I had to get a friend to spend the first day with me so that he could tell me which colours were which, because I had absolutely (9) ________ idea. It was just amazing." Now, as a result of being (10) ________ to distinguish between different on-screen colours, Brian has began a new career working with computers. Mọi người ơi giúp mình với ạ
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