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Questions and answers by
Cornelius O motsisi
Answers (1)
Or you could go on the long way method Supposedly the question doesn't only have numbers e.g (3p-q) and (-13p+7q) Where (3p-q) is the first term and (-13p+7q) is the ninth term. You take the 1st term add it with the last and divide the sum by 2 But
