13-09-2016
Mathematics

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can someone help me with this?

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Verified Answer :

Panoyin Panoyin

13-09-2016

¹/₂|d| + 5 ≥ 2|d| - 13
- ¹/₂|d| - ¹/₂|d|
5 ≥ 1¹/₂|d| - 13
+ 13 + 13
18 ≥ 1¹/₂|d|
1¹/₂ 1¹/₂
12 ≥ |d|
|d| ≤ 12
d ≤ ±12
d ≤ 12 or d ≤ -12
d ∈ (-∞, 12) or (-∞, -12)
d ∈ (-∞, 12)

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