Find the first term, the common diference, and give recursive formula

timer Asked: Aug 11th, 2014
account_balance_wallet $5

Question Description

9th term is 38; 14th term is 63

Tutor Answer

Amanda S
School: Duke University

14-9 is 5  is the difference in the number of terms

63-38 = 25 is the difference in the quantity of the terms

25/5 gives you the difference between each term in this case 5

so if 5 is the difference between each term then

5*9 is the difference between the first term and the ninth term = 40

38 (the 9th term) - 40 (the difference between 1st and 9th) gives you the 1st term = -2

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awesome work thanks

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