SOLUTION: How do you express this series in summation notation? -(1)/(2)+(1)/(4)+(-1)/(6)+(1)/(8)+(-1)/(10)

Question 474053: How do you express this series in summation notation?
-(1)/(2)+(1)/(4)+(-1)/(6)+(1)/(8)+(-1)/(10)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How do you express this series in summation notation?
-(1)/(2)+(1)/(4)+(-1)/(6)+(1)/(8)+(-1)/(10)
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Take care of the signs: (-1)^n
Take of the numerator: 1
Take care of the denominator:(n)(n+1)
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Summation[(-1)^n(1/[n(n+1)]]
for n = 1 to oo
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Cheers,
Stan H.
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