document.write( "Question 423089: find all seventh roots of 3+4i please try and give all steps... \n" ); document.write( "
Algebra.Com's Answer #295199 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! find all seventh roots of 3+4i please try and give all steps... \n" ); document.write( "---- \n" ); document.write( "r = sqrt(3^2+4^2) = 5 \n" ); document.write( "theta = tan^-1(4/3) = 53.13 degrees \n" ); document.write( "----- \n" ); document.write( "(3+4i)^(1/7) = 5^(1/7)(cis(53.13+360n)/7) \n" ); document.write( "--- \n" ); document.write( "To find the 7 roots let n = 0,1,2,3,...,6 \n" ); document.write( "Note: 360/7 = 51.43 degrees \n" ); document.write( "and 53.13/7 = 7.59 \n" ); document.write( "--- \n" ); document.write( "So for n = 3 you get: 5^(1/7)cis(7.59+3(41.43)) \n" ); document.write( "etc. \n" ); document.write( "------------------------------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |