All SAT Math Resources
Example Questions
Example Question #42 : Complex Numbers
Evaluate:
The expression is undefined
is defined to be equal to
for any real or imaginary
and for any real
; therefore,
To evaluate a positive power of , divide the power by 4 and note the remainder:
Therefore,
Substituting,
Rationalizing the denominator by multiplying both numerator and denominator by :
Example Question #3 : Exponential Ratios And Rational Numbers
Solve for .
Since
Hence
Example Question #4 : Exponential Ratios And Rational Numbers
Simplify:
Example Question #221 : Exponents
Solve for :
From the equation one can see that
Hence must be equal to 25.
Example Question #221 : Exponents
Evaluate:
Example Question #222 : Exponents
Solve for .
Example Question #541 : Algebra
and
Find
Hence the correct answer is .
Example Question #542 : Algebra
Solve for .
Use the rules of logarithms to combine terms.
Hence,
By fatoring we get
Hence .
However, you cannot take the logarithm of a negative number. Thus, the only value for is
.
Example Question #543 : Algebra
If a piece of pie is cut into 3 sections, and each of those pieces is further cut into three sections, then those pieces are cut into three sections, how many (tiny) pieces of pie are there?
27
36
12
40
125
27
The answer is 33 = 27
Example Question #544 : Algebra
Solve for .
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