(1)2,13,40,61,( ).A.46.75 B.82 C.88.25 D.121找规律题,请从4个答案中选出一项填入括号内.
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(1)2,13,40,61,( ).A.46.75 B.82 C.88.25 D.121找规律题,请从4个答案中选出一项填入括号内.
(1)2,13,40,61,( ).A.46.75 B.82 C.88.25 D.121
找规律题,请从4个答案中选出一项填入括号内.
(1)2,13,40,61,( ).A.46.75 B.82 C.88.25 D.121找规律题,请从4个答案中选出一项填入括号内.
A
2*6+1=13 13*3+1=40 40*3/2+1=61
61*3/4+1=46.75 (6、3、3/2、3/4为以0.5为公比的数列)
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
a-1/a+2
1-a/-2-a
-2×a×1/a
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a(a-1)(a-2)(a-3)(a-4)因式分解
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a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
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