An equilateral triangle ABC is formed by joining three rods of equal length and D is the mid point of AB. The coefficient of linear expansion for AB is alpha_(1) and for AC and BC is alpha_(2), if distance DC remains constant for small changes in temperature. Find the relation between alpha_(1) and alpha_(2).

An equilateral triangle ABC is formed by joining three rods of equal l

1.	An equilateral triangle ABC is formed by joining three rods of equal length and D is the mid point of AB. The coefficient of linear expansion for AB is alpha_(1) and for AC and BC is alpha_(2), if distance DC remains constant for small changes in temperature. Find the relation between alpha_(1) and alpha_(2).
Answer» ANSWER :`4alpha_(2)=alpha_(1)`