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Insert two arithmetic means between -2 and 13. A. 1, 10 B. 3, 8 C. 2, 9 D. 4, 7

Insert two arithmetic means between -2 and 13. A. 1, 10 B. 3, 8 C. 2, 9 D. 4, 7
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2 votes
Insert two arithmetic means between -2 and 13.

A. 1, 10
B. 3, 8
C. 2, 9
D. 4, 7

User Sharpling
by
8.5k points

1 Answer

5 votes
a1 = -2

a4 = 13

13 = -2 + d ( 4-1 )

13 = -2 + 3d

d = 15/3 = 5

a2 = -2 + 5 = 3

a3 = 3 + 5= 8

3, 8 (B)


User Orak
by
7.8k points
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