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	2	thêm 8 ký tự trong đáp án		Sửa 15-09-17 12:43 AM ๖ۣۜNắng(M) 1
GIẢI :2 x 2^2 x 2^3 ... x 2^x = 32768 = 2^15=> 2^1+2+3+...+x = 2^15 => 1+2+3+...+x=15=> x(x+1)/2 = 15 => x(x+1) = 30 = 5. (5+1)=> x = 5 2 x 2^2 x 2^3 ... x 2^x = 32768 = 2^15=> 2^1+2+3+...+x = 2^15 => 1+2+3+...+x=15=> x(x+1)/2 = 15 => x(x+1) = 30 = 5. (5+1)=> x = 5 GIẢI :2 x 2^2 x 2^3 ... x 2^x = 32768 = 2^15=> 2^1+2+3+...+x = 2^15 => 1+2+3+...+x=15=> x(x+1)/2 = 15 => x(x+1) = 30 = 5. (5+1)=> x = 5

	1	tạo mới		Trả lời 15-09-17 12:30 AM ๖ۣۜNắng(M) 1
2 x 2^2 x 2^3 ... x 2^x = 32768 = 2^15=> 2^1+2+3+...+x = 2^15 => 1+2+3+...+x=15=> x(x+1)/2 = 15 => x(x+1) = 30 = 5. (5+1)=> x = 5

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