SAT Math Practice Question #25594 - SATify | SATify

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SAT Math Practice Question #25594 - SATify | SATify

#25594

algebra

analytic geometry

Calculus

hard

150 sec

Which of the following describes the set of values of $a$ for which the curves $x^{2} + y^{2} = a^{2}$ and $y = x^{2} - a$ in the real $x y$ -plane intersect at exactly $1$ point?

A.

$a < \frac{1}{2}$

B.

$a = \frac{1}{2}$

C.

$a \leq \frac{1}{2}$

D.

$a > \frac{1}{2}$

E.

$a = 1$