Q13 of 180 Page 1

The first three terms of an AP are (3y – 1), (3y + 5) and (5y + 1), the value of y is _____.

OR


If 18, a, (b – 3) are in AP, then value of (2a – b) is ____.


Let three terms are a1, a2 and a3.


Then, a2 – a1 = a3 – a2


Substituting the values, we get


⇒


⇒


⇒


The value of y is 5.


OR


Let three terms are a1, a2 and a3.


Then, a2 – a1 = a3 – a2


Substituting the values, we get


⇒


⇒


⇒


The required value is 15.


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