Question

if 67 is the first term and third term is 178. What is the common difference and What is the 28th term???????​

Answer 1

Answer:

Hay dude your question is fantastic.

So, your answer is also cool.

So you see.

Answer 2

Answer:-

$a_{28} = \dfrac{3131}{2}$

Given :-

$a = 67$

$a_3 = 178$

To find :-

The common difference and the 28 th term.

Solution :-

Let the common - difference be d.

→$a = 67$

→$178 = a + 2d$

→$178 = 67 + 2d$

→$178-67 = 2d$

→$111 = 2d$

→$d = \dfrac{111}{2}$

Now, the 28 th term of A. P is :-

→$a_{28} = a + 27d$

→$a_{28} = 67 + 27 \times \dfrac{111}{2}$

→$a_{28} = 67 + \dfrac{2997}{2}$

→$a_{28} = \dfrac{134+2997}{2}$

→$a_{28} = \dfrac{3131}{2}$

hence, the 28 th term is 3131/2.