Math, asked by altamasansari934, 17 days ago

1. Find the sum of first 15 terms of the following AP (1) 11.6.1. - 4.9 (ID) 7. 12. 17. 22. 27​

Answers

Answered by Aryan385t
0

Answer:

1)360

Step-by-step explanation:

(1) a=11, d=-5, n=15

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

=15/2[2(11)+(15-1)-5

=15/2[22+14(-5)]

=15/2(22-70)

=15/2(48)

=15(24)

=360

Step-by-step explanation:

Answered by 7800130
0

Answer:                                                                                                                        

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