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Whenever the terms on the two sides of the equation are differentnature, then equations are known non standard form of an ordinary equation. But cannot be solved by standard procedure, non standard problemsrequire high degree of logic, they also require the use of graphs, inverse properties of functions, inequalities . The number of solutions of the equation 2 cos ((x)/(2)) = 3 ^(x) + 3^(-x) is

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Answer :A


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