Question

The nth term of an Ap is an=4n+5 then the 3rd term is​

Answer 1

Answer:

3rd term will be 17

Step-by-step explanation:

nth term=4n+5

3rd term

4(3)+5=17

hope it is helpful

Answer 2

Solution :-

given that,

→ A(n) = 4n + 5

so, putting n = 1, first term of given AP will be,

→ A(1) = 4 * 1 + 5 = 4 + 5 = 9

and, putting n = 2, second term of given AP will be,

→ A(2) = 4 * 2 + 5 = 8 + 5 = 13

then,

→ Common difference = A(2) - A(1) = 13 - 9 = 4 .

therefore,

→ A(3) = A(2) + common diffence = 13 + 4 = 17 (Ans.)

Or,

→ A(3) = 4 * 3 + 5 = 12 + 5 = 17 .

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