Question

which of the following is not in a.p?1.-1.2,0.8,2.8,...2.4/3,7/3,9/3,...3.-1/5,-2/5,-3/5,...4.1820,1920,2020,...?​

Answer 1

Answer:

2 IS NOT AN AP

1] 8-(-1.2)=2.8-(.8)=d=2

2] 7/3-4/3 not equal to 9/3-7/3

3] -2/5-(-1/5)=-3/5-(-2/5)=d=-1

4] 1920-1820=2020-1920=d=100

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

1. d= 0.8-(-1.2)=0.8+1.2=2.0&for other d= 2.8-0.8=2.0. therefore d is same,yes it is a.p.
2. d=7/3-4/3=3/3 &for other d= 9/3-7/3=2/3 therefore d is not same no,it is not a.p.
3. d=-2/5-(-1/5)=-2/5+1/5=-1/5&for other d= -3/5-(-2/5)=-1/5 therefore d is same,yes it is a.p.