Question on: JAMB Mathematics - 2008
The fifth term of an A.p. is 24 and the eleventh term is 96. Find the first term
A
12
B
4
C
-12
D
-24
Ask EduPadi AI for a detailed answer
Correct Option: D
In = a + (n - 1)d
24 = a + (5 - 1)d
24 = a + 4d.......(i)
96 = a + (11 - 1)d
96 = a + 10d.......(ii)
a = 24 - 4d.......(iii)
96 = 24 - 4d + 10d
96 = 24 + 6d
96 - 24 = 6d
72 = 6d
d = (\frac{72}{6})
d = 12
a = 24 - 4d
a = 24 - 4 x 12
a = 24 - 48
a = -24
Add your answer
Please share this, thanks!
No responses