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Hoanglong06
2 năm trước
bài 1 : TÍNH a ) 2^3 * 2^2 + 7^4 :7^2 b) 6^2 * 47 + 6^2 * 53 c ) 7^2 * 32 + 7^2 * 69 -7 Bài 2 : tìm mũ số n biêt : a )3* 2^+6=30 b) 30-3*2^n = 24 c)40-5*2^n=20 d)3.2^n + 2^n=16 Bài 3 tìm cơ số tự nhiên , x biết a) 3 * x ^2 = 75 b) 2 * x^3 = 54
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