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Playlist ACT® Intermediate Algebra 25 videos
ACT Math Intermediate Algebra Drill 1, Problem 3. Can you find the value of a in this expression?
ACT Math Intermediate Algebra Drill 1, Problem 5. Can you simplify the expression?
ACT Math Intermediate Algebra Drill 2, Problem 1. Solve the equation.
ACT Math 5.4 Intermediate Algebra 691 Views
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Description:
ACT Math: Intermediate Algebra: Drill 5, Problem 4. Which expression is equivalent?
- Intermediate Algebra / Logarithms
- Product Type / ACT Math
- Foreign Language / Arabic Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Chinese Subtitled
- Foreign Language / Spanish Subtitled
- Algebra / Write expressions in equivalent forms to solve problems
- Algebra / Write expressions in equivalent forms to solve problems
- Algebra / Write expressions in equivalent forms to solve problems
- Intermediate Algebra / Rational, radical, and logarithmic expressions
Transcript
- 00:02
Try this shmoopy question on for size.
- 00:05
Which expression is equivalent to x cubed equals 48?
- 00:08
And here are the potential answers...
- 00:12
OKay, The most important part of this problem is understanding the relationship between logarithms
- 00:17
and exponents.
Full Transcript
- 00:21
If a to the b power equals x, then log base a of x...equals...b.
- 00:31
In this case, the base of the exponent is x, so the base of the logarithm must be x.
- 00:38
That leaves us with C or D. The exponent is 3...so we know the answer must be C.
- 00:42
Answer D would only be correct if we had x to the 48th power equals 3.
- 00:47
But we don't have that. So the answer is C
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