Question: 2. Using only the Important Sums from the course notes, find the num- ber n in each case that makes the following statements true.

2. Using only the "Important Sums" from the course notes, find the

2. Using only the "Important Sums" from the course notes, find the num- ber n in each case that makes the following statements true. Show all working and justify your answer. n (2) = 78 j=1 (b) 2+4+6+8+ +2n = 42

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