Answer:
Given,
A.P is 4, 9, 14,…
a1 = a = 4
a2 = 9
Common difference, d = a2 – a1 = 9 – 4 = 5
an = a + (n – 1)d
an = 4 + (n – 1)5
= 4 + 5n – 5
= 5n – 1
Put, an = 254
5n – 1 = 254
5n = 254 + 1
5n = 255
n = 255/5
n = 51
51st term of given A.P is 254.
Which term of the A.P. 4, 9, 14,… is 254 ?
Which term of the A.P. 4, 9, 14,… is 254 ?