Question

answer this question plzzz
step by step​

Answer 1

hey user here is your answer

Answer 2

Given

a=6

n=27

d=3

S27=?

n=27

SOLUTION

S27=(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)

=13.5×90

=1215

ANSWER: Sn=1215