Question

find the maximum sum of the AP 30 27 24 21 18​

Answer 1

Answer:

the sum of the AP is 180

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

a=30 , d=27-30 , n=?

=-3

an=a+(n-1)d

=30+(n-1)-3

-30=-3 (n-1)

n-1= -30/-3

n-1=10

n=11

Sn=n/2 [2a+(n-1)d]

=11/2 [2×30+(11-1)-3]

=11/2 [60-30]

=11/2 [30]

=11×15

=165

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