Math, asked by srinivas1138, 11 months ago

solve this sum ...... ..... ....​

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Answers

Answered by akshayraj007
0

sum of 6 elements is 102

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Answered by Ranveer01
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The Question is,

Let Sn be the sum of the arithmetic progression. If the first value is 7 and the common difference is 4, determine the sum of first six elements.

Solution:

a = 7

d = 4

sum  =  \frac{n}{2} (2a + (n - 1)d)

 =  \frac{6}{2}  \times (2 (7) + (6 - 1)4)

 = 3 \times (14 + 20)

 = 102

The sum of six elements of an A.P. is 102

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