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Sliva [168]
3 years ago
15

Help pls and fast 21x+1+26=28

Mathematics
2 answers:
Naya [18.7K]3 years ago
8 0
X=1/21 that the answer
Anni [7]3 years ago
5 0

Answer: 21 x = 1

Step-by-step explanation:

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for any positive integer n, the sum of the first n positive integers equals n(n 1)/2. what is the sum of all the even integers b
marusya05 [52]

The sum of all the even integers between 99 and 301 is 20200

To find the sum of even integers between 99 and 301, we will use the arithmetic progressions(AP). The even numbers can be considered as an AP with common difference 2.

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nth term of the AP = first term + (n-1) x common difference

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Therefore, n = (200 + 2 )/2 = 101

That is, there are 101 even integers between 99 and 301.

Sum of the 'n' terms in an AP = n/2 ( first term + last term)

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Thus sum of all the even integers between 99 and 301 = 20200

Learn more about arithmetic progressions at brainly.com/question/24592110

#SPJ4        

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Find the area of the circle r=6
sdas [7]

Answer:

113.1

Step-by-step explanation:

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