求解答:a×b=5,b×c=6,c×d=7,求a×b×c×d=?
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因为a×b=5,b×c=6,c×d=7,
所以(a×b)(b×c)(c×d)=5×6×7
a×b×b×c×c×d=5×6×7
(a×b×c×d)×(b×c)=5×6×7
(a×b×c×d)×6=5×6×7
a×b×c×d=5×7
a×b×c×d=35
所以(a×b)(b×c)(c×d)=5×6×7
a×b×b×c×c×d=5×6×7
(a×b×c×d)×(b×c)=5×6×7
(a×b×c×d)×6=5×6×7
a×b×c×d=5×7
a×b×c×d=35
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