Question

Find the first negative term of an ap 2000,1990,1980,1970

Answer 1

Finding the first negative term:

Given series: 2000, 1990, 1980, 1970

The arithmetic progression here is 2000, 1990, 1980, 1970

This Arithmetic progression has a value of d which is -10

Here all multiples of -10 are parts of this AP

So,  

AP= 2000, 1990, 1980, 1970…… 1930, 1920

10, 0, -10, -20…..

So here -10 is the first negative term.

Hope it helped...