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Theorems on divergent sequences
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Theorem 1 If the sequence is increasing and not bounded from above then it diverges to +∞. Illustration =
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Theorem 2 If the sequence is decreasing and not bounded from below then it diverges to -∞. Illustration =
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Theorem 3 The sequence diverges to +∞ iff the sequence diverges to -∞. Illustrations = diverges to +∞, while = diverges to -∞
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Theorem 4 If the sequences and diverge to +∞, then the sequences and diverge to +∞. Illustrations and diverge to +∞ → and diverge to +∞
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Theorem 5 If the sequences and diverge to -∞, then the sequences diverges to -∞, while the sequence diverges to +∞. Illustrations and diverge to -∞ → diverges to -∞, While diverge to +∞
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Theorem 6 If the sequence diverges to +∞ and the sequence is bounded then the sequence diverges to +∞ Illustration diverges to +∞ and is bounded → diverges to +∞
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Consequence of Theorem 6 If the sequence diverges to +∞ and the sequence is convergent then the sequence diverges to +∞ Illustrations diverges to +∞ and is convergent → diverges to +∞
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Theorem 7 If the sequence diverges to -∞ and the sequence is bounded then the sequence diverges to -∞ Illustration diverges to -∞ and is bounded → diverges to -∞
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Consequence of Theorem 7 If the sequence diverges to -∞ and the sequence is convergent then the sequence diverges to -∞ Illustration diverges to -∞ and is convergent → diverges to -∞
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Example (1) Find the limit of the sequence, if converges
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Example (2) Find the limit of the sequence, if converges
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Example (3) Find the limit of the sequence, if converges
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