3 years ago

What is an atom? be friends

Mathematics

2 answers:

jek_recluse [69]3 years ago

8 0

Answer:

atom is the smallest particle of an element that exists

iris [78.8K]3 years ago

6 0

Its a chemical element, and it is surrounded by electrons.

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Using this formula

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4 years ago

the sum of the first n terms of a sequence is 20 - 10 / 2 ^ n - 1 find the sum of the first five terms

Travka [436]

Answer:

$S_5=\dfrac{170}{9}$

Step-by-step explanation:

Given that,

The sum of first n term of a sequence is $S_n=20-\dfrac{10}{2n-1}$

We need to find the sum of the first 5 terms.

Put n = 5,

$S_5=20-\dfrac{10}{2(5)-1}\\\\=20-\dfrac{10}{10-1}\\\\=20-\dfrac{10}{9}\\\\=\dfrac{170}{9}$

So, the sum of first 5 terms is equal to $\dfrac{170}{9}$ .

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3 years ago

What is an atom? be friends​

What is an atom? be friends