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EXERCISE 11A (iii) \( a_{n}=(-1)^{n-1} \times 2^{n+1} \) by

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EXERCISE 11A (iii) \( a_{n}=(-1)^{n-1} \times 2^{n+1} \) by
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by (15.5k points)

lalruatpu117122, hello 

I am not sure what you are asking us to do here... 

a1 = (-1)0 x 22 = 4 

a2 = (-1)1 x 23 = -8 

a3 = (-1)2 x 24 = 16 

a4 = (-1)3 x 25 = -32 

Please let me know if this helps...

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