Question

For a sequence 1, -5, 25,-125 ….. tn =

1) (-5)1-n 2) (-5)n-1 3) (5)1-n 4) (5)n-1​

Answer 1

Step-by-step explanation:

It is clearly a GP becoz Common ratio is -5

for a GP

Tn=

$a {r}^{n - 1}$

Here a =1 and r =-5

so Tn=

${ - 5}^{n - 1}$