Theory of Equations 1 Question 19
20. Let and be the roots of equation , . If and are in AP and , then the value of is
(2014 Main)
(a)
(b)
(c)
(d)
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Solution:
- PLAN If
has roots and , then and . Find the values of and and then put in to get required value.
Given,
Since,
Also,
[from Eq. (i)]
On putting the value of