2. Calculate the sum of first 10 even numbers using reasoning
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Answer:
55 by n^2+1÷2 FORMULA BRAINLIEST MARK
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Answer:
90
Explanation:
To solve this we will use concepts of arithmetic progression from class 10.
The first term is = a = 0
The total terms are = n = 10
The difference between each term of the arithmetic progression is = d = 2 (because the difference between simultaneous even numbers is 2)
Sum of the terms of the arithmetic progression = S
Now applying the formula.
S = n/2 [a+(n-1)d]
S = 10/2 [0+(10-1)2]
S = 5[18]
S = 90
So the sum of the first 10 even numbers is 90.
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