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1. Let p, q,r be the propositions p: Grizzly bears have not been seen in the area. q: Hiking is safe on the trail. r: Berries are ripe along the trail. Write these propositions using p, q,r and logical connectives. a) Berries are ripe along the trail, but grizzly bears have not been seen in the area. b) For hiking on the trail to be safe, it is necessary but not sufficient that berries not be ripe along the trail and for grizzly bears not to have been seen in the area.

1. Let p, q,r be the propositions p: Grizzly bears have not been seen in the area. q: Hiking is safe on the trail. r: Berries are ripe along the trail. Write these propositions using p, q,r and logical connectives. a) Berries are ripe along the trail, but grizzly bears have not been seen in the area. b) For hiking on the trail to be safe, it is necessary but not sufficient that berries not be ripe along the trail and for grizzly bears not to have been seen in the area.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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1. Let p, q,r be the propositions p: Grizzly bears have not been seen in the area. q: Hiking is safe on the trail. r: Berries are ripe along the trail. Write these propositions using p, q,r and logical connectives. a) Berries are ripe along the trail, but grizzly bears have not been seen in the area. b) For hiking on the trail to be safe, it is necessary but not sufficient that berries not be ripe along the trail and for grizzly bears not to have been seen in the area.
Transcribed Image Text:1. Let p, q,r be the propositions p: Grizzly bears have not been seen in the area. q: Hiking is safe on the trail. r: Berries are ripe along the trail. Write these propositions using p, q,r and logical connectives. a) Berries are ripe along the trail, but grizzly bears have not been seen in the area. b) For hiking on the trail to be safe, it is necessary but not sufficient that berries not be ripe along the trail and for grizzly bears not to have been seen in the area.
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