MathDB

1

Part of 1965 AMC 12/AHSME

Problems(1)

Number of real values of x

Source:

1/11/2009
The number of real values of x x satisfying the equation 2^{2x^2 \minus{} 7x \plus{} 5} \equal{} 1 is: <spanclass=′latex−bold′>(A)</span> 0<spanclass=′latex−bold′>(B)</span> 1<spanclass=′latex−bold′>(C)</span> 2<spanclass=′latex−bold′>(D)</span> 3<spanclass=′latex−bold′>(E)</span> more than 4 <span class='latex-bold'>(A)</span>\ 0 \qquad <span class='latex-bold'>(B)</span>\ 1 \qquad <span class='latex-bold'>(C)</span>\ 2 \qquad <span class='latex-bold'>(D)</span>\ 3 \qquad <span class='latex-bold'>(E)</span>\ \text{more than 4}