<PRE><B>Question 860691</B>
arithmetic sequence
an = a + (n - 1)d
192 = a + 7d,
3= a + 2d
189=5d
d=37.8
a = -363/5,   d = 189/5
a=-72.600,   d=37.800
an = -363/5 + (n - 1)*189/5
geometric sequence
Tn = t * r^(n - 1)
192 = t * r^7,
3 = t * r^2
r = 2*2^(1/5),   t = 3/(4 2^(2/5))
Tn = 3/(4 2^(2/5)) * 2*2^(1/5)^(n - 1)




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