If . Then, the number of real values of for which the three unequal terms , and are in HP is
Explanation for the correct option:
Step 1: Finding and :
Given that,
Step 2: Find the number of real values of :
Since, , and are in HP then are in AP.
By using formula
For , , , becomes equal and it's given the terms are unequal then only one is the real value of i.e .
Hence, the correct option is A.