Question

Find the 6th term from end of the A.P. 17, 14, 11,… – 40.

Answer 1

Answer:

I thing the answer is 20 or 10

Answer 2

Answer

-25

Explanation

Given A.P., 17, 14, 11 ...... - 40

We have to find 6th term from the end

Reversing the A.P., we get

- 40, -37, -33.................17

Now the 6th term of this A.P. would be our required answer

Now, a = - 40

d = 3

Apply formula for general term

$\sf T_n = a + (n - 1)d$

Put n as 6 and the values of a and d.

$\sf T_6 = -40 + (6 - 1)3\\\\\implies T_6 = -40 + 5(3) \\\\\implies T_6 = -40 + 15 \\\\\implies T_6 = -25$

Hence 6 th term from the end of the A.P. 17, 14, 11, ......... - 40 is - 25.