解
簡約 (7−5⋅i⋅x)71
解
6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+678223072849823543−8823675x2+7503125x4−765625x6+6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+6782230728494117715x−10504375x3+3215625x5−78125x7i
解答ステップ
(7−5ix)71
拡張 (7−5ix)7:823543−4117715ix−8823675x2+10504375ix3+7503125x4−3215625ix5−765625x6+78125ix7
=823543−4117715ix−8823675x2+10504375ix3+7503125x4−3215625ix5−765625x6+78125ix71
標準的な複素数形式で 823543−4117715ix−8823675x2+10504375ix3+7503125x4−3215625ix5−765625x6+78125ix7 を書き換える:(823543−8823675x2+7503125x4−765625x6)+(−4117715x+10504375x3−3215625x5+78125x7)i
=(823543−8823675x2+7503125x4−765625x6)+(−4117715x+10504375x3−3215625x5+78125x7)i1
共役で乗じる (823543−8823675x2+7503125x4−765625x6)+(4117715x−10504375x3+3215625x5−78125x7)i(823543−8823675x2+7503125x4−765625x6)+(4117715x−10504375x3+3215625x5−78125x7)i=((823543−8823675x2+7503125x4−765625x6)+(−4117715x+10504375x3−3215625x5+78125x7)i)((823543−8823675x2+7503125x4−765625x6)+(4117715x−10504375x3+3215625x5−78125x7)i)1⋅((823543−8823675x2+7503125x4−765625x6)+(4117715x−10504375x3+3215625x5−78125x7)i)
簡素化 ((823543−8823675x2+7503125x4−765625x6)+(−4117715x+10504375x3−3215625x5+78125x7)i)((823543−8823675x2+7503125x4−765625x6)+(4117715x−10504375x3+3215625x5−78125x7)i)1⋅((823543−8823675x2+7503125x4−765625x6)+(4117715x−10504375x3+3215625x5−78125x7)i):6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+678223072849823543−8823675x2+7503125x4−765625x6+i(4117715x−10504375x3+3215625x5−78125x7)
=6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+678223072849823543−8823675x2+7503125x4−765625x6+i(4117715x−10504375x3+3215625x5−78125x7)
標準的な複素数形式で書き直す:6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+678223072849823543−8823675x2+7503125x4−765625x6+6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+6782230728494117715x−10504375x3+3215625x5−78125x7i
=6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+678223072849823543−8823675x2+7503125x4−765625x6+6103515625x14+83740234375x12+492392578125x10+1608482421875x8+3152625546875x6+3707487643125x4+2422225260175x2+6782230728494117715x−10504375x3+3215625x5−78125x7i