Question

the fifth term of ap 1:-1:-3 is​

Answer 1

Answer:

-7

Step-by-step explanation:

$given$

1,-1,-3

we need to find the fifth term

$a = 1$

$d = - 2$

$n = 5$

$formula \: is \: an = a + (n - 1)d$

$an = 1 + (5 - 1) - 2$

$an = 1 + 4( - 2)$

$an = 1 - 8$

$an = - 7$

$therefore \: the fifth \: term \: of \: the \: ap \: is \: - 7$

Answer 2

Step-by-step explanation:

a = 1 d= -1 -1 = -2

at = a+ 4d

= 1 + 4× (-2)

= -7