1. 1.1! +2.2! +3.3! + ... + n.n! = (n + 1)! - 1 for all n ≥ 1
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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Transcribed Image Text:1. 1.1! +2.2!+ 3.3! + ··· + n.n! = (n + 1)! − 1 for all n ≥ 1
2. 1-2 +2²-23 + 24 - 25 + ... + (−1)n2n
2n+1(-1)+1
3
3. n³n²+ 3 for all n ≥ 2
4. 1+3+9+27+
+3² =
5. 1+4+7+ 10 +
3n+1_
2
+(3n - 2)
=
n(3n-1)
2
6. Σ²¹(2j + 1) = 3n² for all positive integers n.
7. Let a₁ = 2, A₂ = 9, and an = 2an-1 + 3an-2 for n ≥ 3. Show that an ≤ 3" for all positive
integers n.
=
for all n ≥ 0
for all n ≥ 0
for all n ≥ 1
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