Problema Solution
If Tn = 3n - 7, how many terms are negative?
Answer provided by our tutors
Assuming n is integer and positive we have:
For n = 0
T0 = 3*0 - 7
T0 = -7
For n = 1
T1 = 3*1 - 7
T1 = -4
For n = 2
T2 = 3*2 - 7
T2 = -1
For n = 3
T3 = 3*3 - 7
T3 = 2 > 0
Three terms, T0, T1 and T2, are negative.