T
truongminhthuong


Tìm x nguyên biết a) $(x+4)(x+5)(x+6)(x+7)(x+8) = 40$
b) $7.5^{2x} + 12.6^x$ chia hết cho 19
Chú ý gõ latex: http://diendan.hocmai.vn/showthread.php?t=247845
b) $7.5^{2x} + 12.6^x$ chia hết cho 19
Chú ý gõ latex: http://diendan.hocmai.vn/showthread.php?t=247845
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