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Calculus 2nd Edition Rogawski

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578 C H A P T E R 11 INFINITE SERIES<br />

y<br />

y<br />

1<br />

S<br />

0.5<br />

S 1S3<br />

12<br />

S5<br />

10<br />

8<br />

6<br />

S4<br />

S 6<br />

4<br />

S 2 2<br />

n<br />

5 10 15 20<br />

10 20 30 40 50<br />

n<br />

∞∑<br />

(A) Partial sums of S = (−1) n−1 √ 1<br />

n<br />

n=1<br />

FIGURE 3<br />

(B) Partial sums of<br />

∞∑<br />

n=1<br />

1<br />

√ n<br />

The inequality S 2N

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