document.write( "Question 31749:  Find the third term in the expansion of (w+2x)^8.\r
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document.write( "(A) none of these
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document.write( "(B) 112w^6x^2
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document.write( "(C) 299w^5x^3
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document.write( "(D) 56w^4x^4\r
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document.write( "Thank you \n" );
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| Algebra.Com's Answer #18362 by venugopalramana(3286)     You can put this solution on YOUR website! (W+2X)^8 \n" ); document.write( "AS PER BINOMIAL THEOREM IN EXPANSION OF (X+A)^N..THE GENERAL TERM IS GIVEN BY \n" ); document.write( "T(R+1)=NCR*(X^(N-R))*(A^R) \n" ); document.write( "HERE WE HAVE W AS X AND 2X AS A AND N=8....SO... \n" ); document.write( "T(R+1)=NCR*W^(N-R)*(2X)^R.....WE WANT T3....R+1=3......R=2...... \n" ); document.write( "T3=8C2*W^(8-2)*(2X)^2=(8*7/2)*W^6*4X^2=112W^6*X^2 \n" ); document.write( "B IS THE ANSWER \n" ); document.write( " |