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suma numerelor patrate perfecte mai mici decat 50

Răspuns :

1²+2²+3³+4²+5²+6²+7²=1+4+9+16+25+36+49=140
Patratele perfecte mai mici decat 50 sunt:0,1,4,9,16,25,36,49.
0+1+4+9+16+25+36+49=
=1+4+9+16+25+36+49=
=5+9+16+25+36+49=
=14+16+25+36+49=
=30+25+36+49=
=55+46+49=
=101+49=150