Step-by-step explanation:
A1 =-1 ,an = an-1/n ,2>_2
an =-1
n=>_2
a-1 =a-1 -1 /-1.
a-1= -2/-1
both minus will cancel ❌ 2/1
n=2
hence proved
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Step-by-step explanation:
A1 =-1 ,an = an-1/n ,2>_2
an =-1
n=>_2
a-1 =a-1 -1 /-1.
a-1= -2/-1
both minus will cancel ❌ 2/1
n=2
hence proved