Find the Infinite Sum Accurate to Three Decimal Places $$\sum _ { n = 1 } ^ { \infty } ( - 1 ) ^ { n + 1 } \frac { 1 } { ( 2 n ) ! }$$

question 99

Multiple Choice

Find the infinite sum accurate to three decimal places.
- $$\sum _ { n = 1 } ^ { \infty } ( - 1 ) ^ { n + 1 } \frac { 1 } { ( 2 n ) ! }$$

• A) -0.859
• B) 0.859
• C) -0.320
• D) 0.460

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