Question

The arithmetical progression if a=4,d=-4,n=7 then the nth term is

Answer 1

Answer:

nth term = 20

Step-by-step explanation:

an = a + (n-1)d

= 4 + ( 7 -1) -4

= 20

Answer 2

Answer:

if n=7,

Ans= -20

if n is unknown,

Tn= -4n+8

Step-by-step explanation:

Tn= a+ (n-1) d

= 4+ 6(-4)

= 4-24

= -20.

if n is not given,

Tn= a+(n-1) d

Tn= 4+(n-1)d

Tn= 4+(n-1)d= 4+(-4n+4)

Tn= 4+(n-1)d= 4+(-4n+4)= -4n+8