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Calculus- Early Transcendentals, 2021a

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587<br />

9.8.2 R = e<br />

10.1.2 y = arctant +C<br />

9.11.3 x + x3<br />

3 + 2x5<br />

15 , error ±1.27 10.2.6 y = −2e 3t−3<br />

9.9.1 the alternating harmonic series<br />

∞<br />

9.9.2 ∑ (n + 1)x n<br />

10.1.3 y = tn+1<br />

n + 1 + 1<br />

10.1.4 y = t lnt − t +C<br />

n=0<br />

10.1.5 y = nπ, for any integer n<br />

∞<br />

9.9.3 ∑ (n + 1)(n + 2)x n<br />

n=0<br />

10.1.6 none<br />

∞<br />

(n + 1)(n + 2)<br />

10.1.7 y = ± √ t 2 +C<br />

9.9.4 ∑<br />

x n , R = 1<br />

n=0<br />

2<br />

10.1.8 y = ±1, y =(1 + Ae 2t )/(1 − Ae 2t )<br />

∞<br />

−1<br />

9.9.5 C + ∑<br />

n=0<br />

(n + 1)(n + 2) xn+2<br />

10.1.9 y 4 /4 − 5y = t 2 /2 +C<br />

9.10.1 1.<br />

10.1.10 y =(2t/3) 3/2<br />

∞<br />

∑ (−1) n x 2n /(2n)!, R = ∞<br />

n=0<br />

10.1.11 y = M + Ae −kt<br />

2.<br />

∞<br />

∑ x n /n!, R = ∞<br />

10.1.12 10ln(15/2) ≈ 2.52 minutes<br />

n=0<br />

ln5<br />

3.<br />

∞<br />

n (x − 5)n<br />

∑ (−1)<br />

n=0<br />

5 n+1 , R = 5<br />

M<br />

10.1.13 y =<br />

1 + Ae −Mkt<br />

4.<br />

∞<br />

n−1 (x − 1)n<br />

∑ (−1) , R = 1<br />

n=1<br />

n<br />

10.1.14 y = 2e 3t/2<br />

∞<br />

n−1 (x − 2)n<br />

5. ln(2)+ ∑ (−1)<br />

n=1<br />

n2 n , R = 2<br />

10.1.15 t = − ln2<br />

k<br />

6.<br />

∞<br />

∑ (−1) n (n + 1)(x − 1) n , R = 1<br />

n=0<br />

10.1.16 600e −6ln2/5 ≈ 261 mg; 5ln300 ≈ 41 days<br />

ln2<br />

∞<br />

1 · 3 · 5···(2n − 1)<br />

7. 1 + ∑<br />

n=1<br />

n!2 n x n =<br />

10.1.17 100e −200ln2/191 ≈ 48 mg; 5730ln50 ≈ 32339 years<br />

∞<br />

(2n − 1)!<br />

ln2<br />

1 + ∑<br />

n=1<br />

2 2n−1 (n − 1)!n! xn , R = 1<br />

10.1.18 y = y 0 e t ln2<br />

8. x + x 3 /3<br />

∞<br />

10.1.19 500e −5ln2/4 ≈ 210 g<br />

9. ∑ (−1) n x 4n+1 /(2n)!<br />

10.<br />

n=0<br />

∞<br />

∑ (−1) n x n+1 /n!<br />

n=0<br />

10.2.1 y = Ae −5t<br />

10.2.2 y = Ae 2t<br />

10.2.3 y = Ae −arctant<br />

9.11.1 1 − x2<br />

2 + x4<br />

24 − x6 x12<br />

+ ···+<br />

720 12!<br />

10.2.4 y = Ae −t3 /3<br />

9.11.2 1000; 8<br />

10.2.5 y = 4e −t

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