elegant11
Solve |2x – 4| < 6
x < –1 or x > 5
x < 5
1 < x < 5
–1 < x < 5
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geerky42
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HINT:
|2x – 4| < 6 is same thing as -6 < 2x – 4 < 6
Butterfly16
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|dw:1358735372324:dw|Can you solve for x? :o)
geerky42
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Actually, 2x-4 > -6
elegant11
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is x 5 and 1
geerky42
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None.
geerky42
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-6 < 2x – 4 < 6
Try to isolate x.
elegant11
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is –1 < x < 5 the answer?
geerky42
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Yes!
geerky42
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Is this clear?
elegant11
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yes...can you help me with another question?
geerky42
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Sure.
elegant11
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Describe the end behavior of f(x) = 2x^4 – 5x + 1.
elegant11
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do you understand the question?
geerky42
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Yeah, and you can quickly use my knowledge of end behavior. Just take a look at the leading term (2x⁴). We know that it is even function, which mean both ends are going at the same direction. Now, take a look at leading coefficient. It is positive so both ends are going up.
Is this clear?
elegant11
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since there are two pairs does ++, -+ sound right?
geerky42
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Yeah, I guess.
elegant11
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well here are the other choices
++, --
+-, -+
+-, --