Question

(iii) If for an A.P., t2 = 4 and d= -2, then what is the value of a? - ​

Answer 1

Answer:

ঝতগ আমার দিকে তাকালো কিন্তু আমি আমার দিকে তাকালো আর সিড়ির কাছে ঘেষে

Answer 2

Answer :

a = 6

Step-by-step Explanation :

Given : a2 = 4

d = -2

To find : a = ?

We know that,

an = a + ( n − 1 ) d

Where, an = nth term of A.P

a = first term of A.P

d = common difference

Putting the given value in above formula we get,

4 = a + ( 2 - 1 ) × (-2)

4 = a + 1 × (-2)

4 = a - 2

4 + 2 = a

a = 6

Hence a = 6