Fill in each blank with an answer as easy as possible.
Fill in each blank with an answer as easy as possible.
(a)M is a triangular number if and only if___________ is an odd square number.
(b)N is an odd square number if and only if____________is a triangular number.
triangular number:n(n+1)/2,square number:n^2.
(a)M is a triangular number if and only if___________ is an odd square number.
(b)N is an odd square number if and only if____________is a triangular number.
triangular number:n(n+1)/2,square number:n^2.
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1年前1个回答
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