Question

(1)Find the number of terms in 2, -9, -20,…, -141
(2). Find the formula for the nth term of the AP: 10, 6, 2, -2, …
(3). Find the AP whose 8th term is 38 and 22nd term is 108

(4). Find _(2, ) _3 and _(4 )of the recurrence relation of _ = _(−1) + 3, where _1 = 2 and n = 2,3,4,…

Answer 1

Answer:

1 . here,. they have told us to find n so, an = a+(n-1)d

and d=-9+(-2)=-11

-141=2+(n-1)-11

= 2-11n+11

=13-11n

-154=11n

n=. -154/-11

n=14