Câu hỏi

Cho . Giá trị của x bằng: A. 1 4 " src="data:image/jpeg;charset=utf-8;base64,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" style="width: 16.00px; height: 36.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="1 fourth"> B. - 1 4 " src="data:image/jpeg;charset=utf-8;base64,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" style="width: 29.33px; height: 36.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="fraction numerator negative 1 over denominator 4 end fraction"> C. 2 5 " src="data:image/jpeg;charset=utf-8;base64,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" style="width: 16.00px; height: 36.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="2 over 5"> D. 5 4 " src="data:image/jpeg;charset=utf-8;base64,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" style="width: 16.00px; height: 36.00px; margin-left: 0.00px; margin-top: 0.00px; transform: rotate(0.00rad) translateZ(0px); -webkit-transform: rotate(0.00rad) translateZ(0px);" title="5 over 4">