Question

PLEASE answer both...
irrelevant answers will be reported ​

Answer 1

Answer:

47. ⟹(a−3d)

2

+(a−d)

2

+(a+d)

2

+(a+3d)

2

=120

⟹4a

2

+20d

2

=120

⟹a

2

+5d

2

=30

⟹25+5d

2

=30

⟹5d

2

=5⟹d=±1

If d=1, the, the numbers are 2,4,6,8.

sry idk the second one

Answer 2

Answer:

please refer the attachment