Question

.The nth term of an A.P. 5, 2, -1, -4, -7 … is *

(a) 2n + 5
(b) 2n – 5
(c) 8 – 3n
(d) 3n – 8​

Answer 1

Answer:

(d). 3n - 8

............

Answer 2

Answer:

d = a2 -a1 = 2-5 = -3

an= a +( n -1)d

an = 5 + (n-1) -3

an= 5+ 3n+3

an = 8+ 3n

where an = nth term

a = first term

d= difference