If the nth term of the A.P. 9,7,5,... is same as the nth term of the A.P. 15,12,9,... find n.

Open in App

Solution

According to the question,

$a_{n} = a + (n - 1) d ∴ 9 + (n - 1) (- 2) = 15 + (n - 1) (- 3) \Rightarrow 3 n - 3 - 2 n + 2 = 6 \Rightarrow n - 1 = 6 n = 7$

Suggest Corrections

Similar questions

n t h

9, 7, 5..

n t h

15, 12, 9, . . .

n .

n

9, 7, 5, . . . . .

n

15, 12, 9, . . . .

n

Two A.P.'s are given 9,7,5,.... and 24,21,18,... If nth term of both the progressions are equal then find the value of n and nth term?

9, 7, 5,

24, 21, 18,

n^{t h}

n a n d n^{t h}

Join BYJU'S Learning Program