I'm guessing the sum is supposed to be

Split the summand into partial fractions:


If  , then
, then

If  , then
, then

This means

Consider the  th partial sum of the series:
th partial sum of the series:

The sum telescopes so that

and as  , the second term vanishes and leaves us with
, the second term vanishes and leaves us with

 
        
             
        
        
        
Answer:

Step-by-step explanation:
3p + 4r = q
3p = q - 4r

 
        
                    
             
        
        
        
Answer:
2134
Step-by-step explanation:
 
        
                    
             
        
        
        
Intersecting is where two lines cross at any angle.
Perpendicular means two lines cross at exactly a 90-degree angle
Parallel indicates that the two lines have the same slope and never cross.