A) No solution
B) One solution
C) Two solutions
D) Infinitely many solutions
Correct Answer: A
Solution :
We know \[\frac{{{5}^{x}}+{{5}^{-x}}}{2}\ge 1\], (using A.M. \[\ge \] G.M.) But since \[\text{cos}\,({{e}^{x}})\le 1\] So, there does not exist any solution.You need to login to perform this action.
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