Question

The first term and the common difference of an
it
6.
A.P. are 6 and 3 respectively,
Complete the following activity to find S,
Here, a = 6, d = 3, S1 = ?
5. - 2 + (n-1)d
S = [12 + (27 - 1)
.
X
= 27 x 45​

Answer 1

Answer:

Solution:

Given a=6d=3

S

27

=

2

n

[2a+(n−1)d]

S

27

=

2

27

[2×6+26×3]

=

2

27

[12+78]

=

2

27

[90]

=1,215

Step-by-step explanation:

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