Free thyroxine (free T4) tests are used to help evaluate thyroid function and diagnose thyroid diseases, including hyperthyroidism and hypothyroidism, usually after discovering that the thyroid stimulating hormone (TSH) level is abnormal. T4 and another hormone called triiodothyronine (T3) are produced by the thyroid gland.
[When the determinant of a matrix is nonzero, linear system it represents is linearly independent]. When the determinant of a matrix is zero, it rows are linearly dependent vectors, and its columns are linearly dependent vectors.
How to Find Determinant of a 3x3 Matrix. 1. Extend the matrix by writing the first and second columns again on the right side of the third column. 2. Multiply the three entries on the diagonal from the first row and first column entry to the third row and third column entry.If we are finding the determinant of the 3x3 matrix B, then calculate b 11 *b 22 *b 33. 3.ultiply the three entries on the diagonal from the first row and third column entry to the third row and first column entry If we are finding the determinant of the 3x3 matrix B, then calculate b 13 *b 22 *b 31. 6.