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- Review of Exponents and Radicals
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- If a and b are positive integers:
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- a b a+b
- x x = x
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- a
- x a-b 1
- ──── = x = ──────
- b b-a
- x x
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- a b ab
- (x ) = x
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- a a a
- (xy) = x y
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- a a a
- (x/y) = x / y
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- O
- x = 1 ( if x ╪ O )
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- -a a
- x = 1 / x
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- _____
- a/b b ▌ a
- x = \▌ x
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- -a/b a/b
- x = 1 / x
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- _____
- b ▌ 1/b
- \▌ x = x
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- _____ _____ _____
- b ▌ b ▌ b ▌
- \▌ x \▌ y = \▌ xy
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- ____
- b ▌ ____
- \▌ x b ▌ x
- ─────── = ▌───
- ____ \▌ y
- b ▌
- \▌ y
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- ┌─────────────────┐
- │ Common Mistakes │
- └─────────────────┘
- _______ __ __
- NOTE: There is NO formula relating \▌x + y to \▌x + \▌y .
- This is the biggest single mistake we see in this area. If you make this
- mistake it is very unlikely you'll ever do well in calculus.
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- -1/3 1 -1/3 1
- WRONG x = ──── RIGHT x = ─────
- 3 1/3
- x x
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- _________ ________
- ▌ 2 ▌ 2
- WRONG \▌ x + 1 = x + 1 RIGHT \▌ x + 1 cannot be simplified.
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- _________ _________ _________ __________
- ▌ 2 ▌ 2 3 ▌ 2 ▌ 3 4
- WRONG x\▌ x + x = \▌ x + x RIGHT x\▌ x + x = \▌ x + x
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- This is the end of the help file. Press the ESC key to return to the quiz
- question you were doing.