What is the 48th term in the sequence? 11.5, 19, 26.5, 34, 41.5, . . .

QUESTION POSTED AT 01/06/2020 - 03:02 PM

Answered by admin AT 01/06/2020 - 03:02 PM

U have an arithmetic sequence with a common difference of 7.5

an = a1 + (n - 1) * d
a1 = first term = 11.5
n = term to find = 48
d = common difference = 7.5
now it is just a matter of subbing
a48 = 11.5 + (48 - 1) * 7.5
a48 = 11.5 + 47 * 7.5
a48 = 11.5 + 352.5
a48 = 364 <=== ur 48th term
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