aylinsalic32 aylinsalic32

13-10-2020
Mathematics

contestada

find a9 of an= 3n-7.

Respuesta :

InstBreaker InstBreaker

13-10-2020

Answer:

a9=20

Step-by-step explanation:

an=3n-7

a1=3(1)-7

=3-7

=-4

a2=3(2)-7

=6-7

=-1

a3=3(3)-7

=9-7

=2

a=-4....a2=-1....a3=2

d=a2-a1

=3

a9=a+(n-1)d

=-4+(9-1)3

=-4+8(3)

=-4+24

=20..

Answer Link

brestanley715 brestanley715

13-10-2020

a9 = 20

Have a nice day :)

Answer Link

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