Question

Which term of the AP 14, 11,8.....is-1​

Answer 1

Answer:

A=14, d=-3,l=-1

l=a+(n-1)d

-1=14+(n-1)(-3)

-15÷(-3)=(n-1)

n-1=5

n=6

So it's 6th term will be -1.

Answer 2

Answer:

given : a = 14, d = 11 - 14 = -3, aₙ = -1

to find n

aₙ = a + (n-1) d

=> -1 = 14 + [(n - 1 ) (-3) ]

=> -1 = 14 + ( -3n + 3)

=> -1 = 14 - 3n + 3

=> 3n = 14 + 3 + 1

=> 3n = 18

n = 6

6th term is - 1 Answer