Question

30th term of the A.P. 10, 7, 4, ----- is.
(a) 97
(v (b) -77
(c) 77
( ) (d) -87​

Answer 1

OPTION (B)

So, 30th term = t30=10+(30−1)(−3)⟹t30=10−87=−77.

Answer 2

Solution :

Given AP : 10 , 7, 4 .....

• first term (a) = 10
• common difference = -3

we need to find 30th term of Given AP

30th term can be written as

a + 29d....(1)

putting values of a and d in (1)

= 10 + 29 × (-3)

= 10 - 87

= - 77

Hence

• -77 is the 30th term of AP.
• Option (B) -77 is correct√

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