Question

Which term of the series 1/4, -1/2 ,1....... Is -128?

Answer 1

Answer:

n= 172

Step-by-step explanation:

a=1/4

d= a2-a1

=-1/2-1/4

= -3/4

an= -128

n=?

an= a+(n-1)d

-128= 1/4+(n-1)(-3/4)

(-128)-1/4= (-3n+3)/4

-516= -3n

-516/-3 = n

172 =n

172nd term of the A.P : 1/4, -1/2, 1.... is -128.

I hope this answer helps you !!

Answer 2

Answer:



Step-by-step explanation: