Question

Find the nth term :
-7,-12,-17,-22,-27

Answer 1

Answer:

nth term is - ( 5n + 2)

Step-by-step explanation:

anth = a + (n-1)d

anth = (-7) + (n-1)(-5)

anth = -(5n + 2 )

Answer 2

Answer:

$a \: = - 7 \\ d = a 2 - a1 = ( - 12 - ( - 7)) = - 12 + 7 = - 5 \\ an = - 27 \\ \\ an = a + (n - 1)d \\ - 27 = - 7 + (n - 1) - 5 \\ - 27 + 7 = (n - 1) - 5 \\ - 20 =(n - 1) - 5 \\ - 20 \div - 5 = (n - 1) = \\ 4 = (n - 1) \\ 4 + 1 = n \\ 5 = n$