document.write( "Question 1153897: Calculate by means of the binomial theorem the value of(16.32)^1/2 to 5 decimal places \n" ); document.write( "
Algebra.Com's Answer #776223 by greenestamps(13203)\"\" \"About 
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\n" ); document.write( "Here are the first few terms of the expansion of (a+b)^n using the binomial theorem.

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\n" ); document.write( "When n is not a positive integer, we want to write the \"C%28n%2Cr%29\" numbers in expanded form:

\n" ); document.write( "\"C%28n%2C0%29+=+1\"
\n" ); document.write( "\"C%28n%2C1%29+=+n%2F1%21\"
\n" ); document.write( "\"C%28n%2C2%29+=+%28n%28n-1%29%29%2F2%21%29\"
\n" ); document.write( "etc....

\n" ); document.write( "Then the first few terms of the expansion are

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\n" ); document.write( "Now we can plug in n=0.5, a=16, and b=0.32 to find the square root of 16.32 to several decimal places.

\n" ); document.write( "\"a%5En+=+16%5E0.5+=+4\"

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\n" ); document.write( "So we have the square root of 16.32, using the first four terms of the binomial expansion of \"%2816%2B.32%29%5E0.5\", as being

\n" ); document.write( "\"4%2B.04-.0002%2B.000002+=+4.039802\"

\n" ); document.write( "The actual value to 9 decimal places is 4.039801975, so our approximation is good to 6 decimal places.

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