標題:
Find the values of r ^ ( ) = ( ).
發問:
What is the values of r in the following questions? (a) r ^ 1 = 56 (b) r ^ 2 = 81 (c) r ^ 3 = 27 (d) r ^ 4 = 4096 (c) r ^ 5 = 243 (d) r ^ 6 = 729 (e) r ^ 7 = 78125 (f) r ^ 8 = 65536 (g) r ^ 9 = 512 (h) r ^ 10 = 1024
最佳解答:
a) 56 b) 9 c) 2 d) 8 c) 3 d) 3 e) 5 f) 4 g) 2 h) 2
其他解答:
如果不能用計算機計算，可以用質因數分解法 (a) r = 56 (b) r ^2 = 3 x 3x 3x 3=9*9 ==> r = 9 (c) r^3 = 3x3x3==> r = 3 (d) r^4 = 2x2 ....12個 ...x2=(2x2x2)x(2x2x2)x(2x2x2)x(2x2x2)=8x8x8x8==>r=8 (e) r^5 = 3x3x3x3x3==>r=3 (f) r^8 = 2x2 ....16個 ...x2=(2x2)x(2x2)x(2x2)x(2x2)x(2x2)x(2x2)x(2x2)x(2x2)=4x4x4x4x4x4x4x4==>r=4 (g) r^9 = 2x2x2x2x2x2x2x2x2==>r=2 (h) r^10 = 2x2x2x2x2x2x2x2x2x2==>r=2 2006-11-18 02:07:41 補充： (d)r^6=3x3x3x3x3x3== r=3(e)r^7=5x5x5x5x5x5x5== r=5
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