How many real numbers b are there such that the equation 3^x + 3^-x = b [3 to the power of x plus 3 to the power of negative x equals b] has a unique real solution x?
W) There are no such values of b
X) There is exactly one such value of b
Y) There are exactly two such values of b
Z) There are infinitely many such values of b
✔️Answer:X) THERE IS EXACTLY ONE SUCH VALUE OF b
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