document.write( "Question 1115329: Using the Intermediate Value Theorem, determine whether the function has at least one real zero between a and b.
\n" ); document.write( "f(x) = x^ 3 + 3x^ 2 – 9x – 13 a = -5 b = -4
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Algebra.Com's Answer #730212 by Fombitz(32388)\"\" \"About 
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\"f%28-5%29=+%28-5%29%5E+3+%2B+3%28-5%29%5E+2+-+9%28-5%29+-+13+=+-125%2B75%2B45-13=-18\"
\n" ); document.write( "\"f%28-4%29=+%28-4%29%5E+3+%2B+3%28-4%29%5E+2+-+9%28-4%29+-+13+=+-64%2B48%2B36-13+=7\"
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\n" ); document.write( "Yes
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