Answers edited by Krzysztof S.

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• How do you find the derivative of #f(x)=ln(2x^2+1)#?
  
• Two objects have masses of #42 MG# and #48 MG#. How much does the gravitational potential energy between the objects change if the distance between them changes from #21 m# to #15 m#?
  
• Question #f5014