Choose the correct choice in the following and justify:
(i) 30th term of the AP: 10, 7, 4, . . . , is
A. 97 B. 77
C. –77 D. – 87
(ii) 11th term of the AP: 
is
A. 28 B. 22
C. –38 D. – 48
(i)
Here, a = 10, d = – 3 and n = 30
We know:
an = a + (n – 1)d
Or, a30 = 10 + (30 – 1)(- 3)
= 10 – 87 = - 77
Hence,
Answer (C) – 77
(ii) Here, a = - 3, d = 5/2 and n = 11
We know that, an = a + (n – 1)d
Or, a11 = - 3 + (11 – 1) 5/2
= - 3 + 10 x (5/2) = - 3 + 25 = 22
Hence,
Answer (B) 22
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