If the 6th term of an arithmetic progression is... - JAMB Mathematics 1994 Question
If the 6th term of an arithmetic progression is 11 and the first term is 1, find the common difference.
A
\(\frac{12}{5}\)
B
\(\frac{5}{3}\)
C
-2
D
2
correct option: d
In an AP, Tn = a + (n - 1)d
T6 = a + 5d = 11
The first term = a = 1
∴ T6 = 1 + 5d = 11
5d = 11 - 1
5d = 10
∴ d = 2
T6 = a + 5d = 11
The first term = a = 1
∴ T6 = 1 + 5d = 11
5d = 11 - 1
5d = 10
∴ d = 2
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