Question

find the nth term of an ap whose first term is -2 , common difference is -3 and last term is -17​

Answer 1

Step-by-step explanation:

use formula =l-(n-1)d

put on it

we get

=-17-(-2-1)-3

=-17-6

= -25

Answer 2

Answer:

n = 6

Step-by-step explanation:

Given, a = -2

d = -3

an= -17

According to the formula,

an = a+ (n-1) d

-17 = (-2) + (n-1) (-3)

-17+2 = (n-1) (-3)

-15/-3 = n-1

n-1 = 5

n = 5+1

n=6

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