1.

The equation `(sqrt(5)+2)^(|x|)+(sqrt(5)-2)^(|x|)=18`. hasA. only one solutionB. two solutionsC. no solutionD. any number of solutions

Answer» Correct Answer - B
We have,
`(sqrt(5)+2)^(|x|)+(sqrt(5)-2)^(|x|)=(sqrt(5)+2)^2)+(sqrt(5)-2)^2)`
`implies |x|=2 implies x=+-2`


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