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A sequence is defined by the formula f(n+1)=f(n)- 3 if f( 4)=22what's is f(1)
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A sequence is defined by the formula f(n+1)=f(n)- 3 if f( 4)=22what's is f(1)

User Asaf David
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f(n+1)=f(n)- 3\\ f(n)=f(n+1)+3\\\\ f(3)=22+3=25\\ f(2)=25+3=28\\ f(1)=28+3=31
User Tksfz
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