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

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2. is not an AP

Step-by-step explanation:

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

Therefore question no.2 is not an AP

HOPE IT HELPS YOU BETTER

Answer 2

Step-by-step explanation:

2ND ONE IS NOT IN AP

BECAUSE AP MEANS DIFFERENCES WILL BE EQUAL

BUT UN THAT DIFFERENCE S ARE NOT EQUAL

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