Question

State whether the sequence -11,-15,-19,-23 is an A.P or not. Justify

Answer 1

Answer:

hey mate here you go..

Step-by-step explanation:

plz mark as BRAINLIST ❤️

Answer 2

Answer:

Hello

$a = - 11 \\ d = - 26 \\ an = - 23 \\ an = \alpha + (n - 1)d \\ - 23 = - 11 + (n - 1) - 26 \\ - 23 + 11 = (n - 1) - 26 \\ \frac{ - 12}{26} = n - 1 \\ \frac{ - 6}{13} = n - 1 \\ 21.6 + 1 = n \\ 21.7 = n$

Step-by-step explanation:

ok