The first term a of an A P is equal to twice th... - WAEC Mathematics 1991 Question
The first term a of an A.P is equal to twice the
common difference d. Find, in terms of d, the 5th
term of the A.P.
common difference d. Find, in terms of d, the 5th
term of the A.P.
A
4d
B
5d
C
6d
D
a + 5d
correct option: c
Tn = a + (n - 1)d; AP; a = 2d; Tn = 2d + (n - 1)d
T5 = 2d + (5 - 1)d = 2d + 4d = 6d
T5 = 2d + (5 - 1)d = 2d + 4d = 6d
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