1.

F(n) = a + (n - 1) d, n belongs to N prove that A.M.of f(1) and S(2n-1) is f(n) ​

Answer»

F(n)=2n+3 is a linear function.

HENCE f(n

1

)=f(n

2

)⇒n

1

=n

2

Here Domain is N but range is set of all odd NUMBER −{1,3}

Hence f(n) is INJECTIVE or one-to-one function.


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