求2^6-2^5+2^4+2^3+2^2+2+1的值大神们帮帮忙

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求2^6-2^5+2^4+2^3+2^2+2+1的值大神们帮帮忙
求2^6-2^5+2^4+2^3+2^2+2+1的值大神们帮帮忙

求2^6-2^5+2^4+2^3+2^2+2+1的值大神们帮帮忙
2^6 - 2^5+2^4+2^3+2^2 +2 + 1 = 2^5[2-1] + 2^4+2+2+2+1 = 2^5+2^4+2+2+2+1 =32+16+8+4+2+1 =63 或令S=2^6-2^5+2^4+2^3+2^2+2+1 -------[1] 则2S = 2^7-2^6+2^5 +2^4+2^3+2^2+2-------[2] [2] -[1] 的 S=2^7 -2^6-2^6+2^5+2^5-1 = 2^7-2^7 +2^6-1 = 2^6 -1 = 64-1 =63

求2,3,4,5, 求2 求2, 求-2 求2 求2, 求（2, 求2 . 求2,3,4,5,6, 求2道题目...求 2,3题求解答,求过程! r=6求c r=2.3求c r=2/5求c d=3.6求c d=2/3求c d=3/5求c c=1r=6求cr=2.3求cr=2/5求cd=3.6求cd=2/3求cd=3/5求cc=15.7求dc=219.8求rc=62.8求r 2：5求比值求-2x-5 2 4求极限 2 4 求验证 4:2/5求比值求4,5,1,2,