Question

a = 6, d = 3, S = ?
27
n
S = 5 (0+ (n-1) d)
.
27
S =
[12 + (27-1) )
27 2.
27
xo
2
)
12+
11
= 27 x 45 =​

Answer 1

Answer:

what is this dgichoigxixigxxigg

Answer 2

n/2(2a+(n-1)d

27/2(2)(6)+(27-1)3

27/2(12+(26)(3)

27/2(12+78)

27/2(90)

(27)(45)

Explanation:

1215