Best in 7 days
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Description
Calculos volumen 1 cálculo con funciones de una variable, con una introducción al álgebra segunda ediciónLos dos tomos de este ? Calculus? sirven muy adecuadamente como textos de dos primeros cursos en estudios que requieran una slida base matemtica, pues a las notables cualidades didcticas de un libro destinado a introducir al estudiante en el espritu y prctica de la Matemtica bsica, se aade la ponderacin y rigor lgico en la exposicin de las teoras, lo que da carcter modlico a esta obra.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.5 ★★★★★
Based on 270 reviews
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Product Reviews
★★★★★ 2
Junk
Able to chew up in about a day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
★★★★★ 5
Works like a charm!
Color: Brown
Works like a charm. My puppy was crying and would not stop -as soon as I put batteries in and turned it on -my puppy went right to sleep and slept all night. I’d say that’s 5 stars.
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Reviewed in the United States on June 10, 2026
★★★★★ 5
Perfect for puppies!!
Color: Brown
I have boughtv3 of these! I bought one for each of my puppies. They still have them and sleep with them. My oldest dog is a rottweiler and is 4 now, she has kept her heartbeat puppy in almost perfect condition.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Worth the money!
Color: Brown
If your puppy has a hard time sleeping- just get it! Our puppy loves it and sleeps with it every night! I couldn’t believe the difference it made. He sleeps through most of the night now and only wakes up to potty!
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Reviewed in the United States on May 16, 2026
★★★★★ 4
Cute, unrealistically loud, and quickly outgrown
Color: Brown-D
This puppy is super cute. The heartbeat sound is louder than it needs to be. My puppy (8-11 weeks) doesn't seem to find it comforting. The cactus toys are cute but are destroyed easily. The rope toys in varying sizes are holding up well, but we will have to remove half of them as they are becoming a choking hazard size as our puppy grows. We've only had this a couple of weeks, and she's already outgrown most of what is in this set.
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Reviewed in the United States on February 14, 2026
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