Question

find the 20th term form end of Ap:-143, 137, 131,125 ... (-97) ​

Answer 1

Step-by-step explanation:

An=a+(n-1)d

a=143

d=-6

n=20

therefore An=a+(n+1)d

A20=143+(20-1)(-6)

A20= 143+19(-6)

A20 = 143-144

A20 = -1

so the 20th term of the series is -1