Question

Arithmetical Progression
"n" th term of an A.P. is (2n-1), find out 7th term.

Answer 1

Hint: What happens when you replace n with 7?

Answer 2

a+13d

Answer 3

Ummm, I'm not sure how you got that? The progression is 2n-1, right?

Answer 4

yes it is the n'th term

Answer 5

So, in that formula, if you put 7 in place of n, what do you get (and how)?

Answer 6

n'th term = a+(n-1)d

this is what i am using.

Answer 7

putting 7 in (2n-1)= 13

Answer 8

@gemini208012 and that's your answer. In this case, they give you the nth term explicitly, no need for the regular formula

Answer 9

bingo ! gosh I was using too much knowledge . I never thought it was that simple. Thank you @barrycarter