a)Find the 1st term and the common difference of the arithmetic sequence. b)Find the general term of the arithmetic sequence.

an = a1 + (n-1)d 18 = a1 + (5-1)d 27 = a1 + (8-1)d so -9 = -3d d = 3 then a1 = 18 - 12 = 6 so an = 6 + (n-1)3

common difference=3,1st term=6and general term=3+3n

13,26,39,52

If a sequence has a first term of 16 and a common difference of -7, what is the 5th and 6th term

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