Question

-2 ,4 , -8 , 16 are in AP or not

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Answer 1

Answer:

Not a AP

Step-by-step explanation:

a1 = -2

a2 = 4

a3 = -8

a4 = 16

difference , d1 = a2-a1=(4)-(2)=2

difference , d2 = a3-a2=(-8)-(4)=-12

difference , d3 = a4-a3=(16)-(-8)=24

since the common difference not same at all

therefore these is not AP.