|When multiplying with the same base, add the exponents:
For example, x ^2 X x ^3 = x ^6 (A raised caret indicates an exponent.)
When determining a power to a power, multiply the exponents:
For example, x ^3^4 = x ^12 (A raised caret indicates an exponent.)
A negative exponent means divide:
the base and its exponent are the denominator of a fraction.
For example, (a + b) ^ -2 means ------------- (Raised caret is exponent.)
(a + b) ^2
In a fractional exponent,
the numerator is the power; the denominator is the root.
In (a + b) ^ 1/2 the 1 means (a + b) to the first power and
the 2 means the squre root of (a + b) ^ 1/2
(A raised caret indicates an exponent.)
Practice with official SAT questions:
Easy: page 459, #2 > Go to explanation
Moderate: page 425, #8 > Go to explanation
Difficult: page 426, #14 > Go to explanation
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|Many students believe the SAT is a test of advanced math, but the SAT
has only arithmetic, algebra, and geometry - no trigonometry or calculus.
|SAT TIP: Memorize just four