Question

the nth term of an Ap an=9-5n,then the 3rd term is_______​

Answer 1

Answer: (-6)

Step-by-step explanation:

an= 9-5n = a+(n-1)d

so, 9-5n = a+nd-d

by comparison, nd= -5d, and 9= a-d

so, d= -5, and a = 4

a3 = a+(3-1)d

= 4+2*(-5)

= 4-10

= -6