Question

what is the sum of first ten odd number

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Answer 1

Answer:

Step 1

Address the formula, input parameters & values.

Input parameters & values:

The number series 1, 3, 5, 7, 9, . . . . , 19.

The first term a = 1

The common difference d = 2

Total number of terms n = 10

Step 2

Apply the input parameter values in the AP formula

Sum = n/2 x (a + Tn)

= 10/2 x (1 + 19)

= (10 x 20)/ 2

= 200/2

1 + 3 + 5 + 7 + 9 + . . . . + 19 = 100

Therefore, 100 is the sum of first 10 odd numbers.

__________

Answer 2

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♡if we apply odd number theorem:

sum of first 10 odd numbers

= n * n

= 10 * 10

= 100......♥

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