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The given sequence is an arithmetic progression with common difference d = 4 and first term a = 3.
Sum of n terms of an A.P. is given by: Sn = n/2 x [2a + (n-1)d]
We need to find sum of 11 terms so n = 11.
Putting value of n, a and d we get:
S11 = 11/2 x [2x3 + (11 - 1) x 4]
S11 = 11/2 x [6 + 40]
S11 = 11/2 x 46 = 11 x 23 = 253
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∙ 11y ago
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What is 3 plus 11 plus 11 plus 11 plus 12 plus 13 plus 15 plus 15 plus 16 plus 17 plus 19?
3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
What is 1 plus 3 plus 5 plus 7 plus 9 plus 11 plus 13 plus 15 plus 17 plus 19 equals 50?
No it doesn't. That sum is 100.
The sum of 18 and 15 the difference of 18 and 15. What is the quotient of the sum and the difference?
11
What is is 50 plus 45 plus 15?
The total sum is 110
What is the sum of -15 plus 23 equals?
(-15) + 23 = 8
The sum of addends 11 and 15 is?
The sum of addends 11 and 15 is: 11 + 15 = 26
What is the sum as a product of the Greatest Common Factor of 75 plus 90?
15 x 11
What is the sum of 75 plus 90 as the product of their gcf and another sum?
(5 x 15) + (6 x 15) = 11 x 15 = 165
15 plus 9 plus (-9)?
They sum up to 15
What is two fifth plus one third?
Expressed as a proper fraction in its simplest form, 1/3 + 2/5 = 11/15 or eleven fifteenths.1/3 + 2/55/15 + 6/1511/155/15 + 6/15 = 11/15
What is 3 plus 11 plus 11 plus 11 plus 12 plus 13 plus 15 plus 15 plus 16 plus 17 plus 19?
3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
What is 1 plus 3 plus 5 plus 7 plus 9 plus 11 plus 13 plus 15 plus 17 plus 19 equals 50?
No it doesn't. That sum is 100.
The sum of 18 and 15 the difference of 18 and 15. What is the quotient of the sum and the difference?
11
What is the sum of -14 plus 29?
the sum of -14 + 29 is 15
What is the sum of 4 and 11?
11+4=15
Sum of 8 plus 7?
15
What is the sum to 228 plus 15?
243
