Question

a, b, c are three terms of an ap then b=
(i)ac/2
(ii)a+c/2
(iii)root ac
(iv)2/a+c​

Answer 1

Answer:

a+c/2

Step-by-step explanation:

if three terms are in AP we can consider them as

x-d,x,x+d

so,

a+c=2x

b=x

therefore,

b=(a+c)/2

Answer 2

QUESTION :-

a, b, c are three terms of an ap then b=

(i) ac/2

(ii) (a+c)/2

(iii)root ac or √(ac)

(iv)2/(a+c)

SOLUTION:

Given :

a, b, c are three terms of an A.P

To find:

the correct option

Concept used:

⟹ 2b= a+c

where :-

• b = second term
• a= first term
• c= third term

Procedure :

we know for an AP :- a, b, c

⟹2b= a+c

⟹b = (a+c)/2

therefore option (ii) (a+c)/2 is correct.

ANSWER : (ii) (a+c)/2

______________________

Learn more Formulae :-

1. Tn = a+(n-1)d

2. Sn = n/2[2a+(n-1)d]

3. Sn = n/2(a+l)

______________________