Question

nth term of an AP: 95, 90, 85... is 0, then n is

Answer 1

put An=0

d=-5

a=95

a+(n-1)d=0

95+(n-1)-5=0

95-5n+5=0

100=5n

n=20

Answer 2

Step-by-step explanation:

A = 95

D = 5

An = a + ( n-1 ) X d

0 = 95 + ( n -1 ) X -5

0 = 95 - 5n + 5

0 = 100 -5n

0 - 100 = -5n

-100/-5=n

20= n

n = 20