the first term of an arithmetic sequence is -3.3 and it's 19 th term is 5.7
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Answer:
a= -3.3
Step-by-step explanation:
t(n) = a+(n-1)d
t(19) = -3.3 +(19-1) d
5.7 = -3.3 + 18d
5.7+3.3 = 18d
9= 18d
9/18 = d
d = 0.5 or 1/2
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