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Integrate x/(x^2+2)

0.5Ln(x^2+2)+ C

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Answered by Rajan S. • Maths tutor

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1. (a) Find the sum of all the integers between 1 and 1000 which are divisible by 7. (b) Hence, or otherwise, evaluate the sum of (7r+2) from r=1 to r=142

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