%0 Journal Article %T Pre-service mathematics teachers' mental constructions when using Cramer's rule %A Brijlall %A Deonarain %A Ndlovu %A Zanele %J Journal of Power and Energy Engineering 电力与能源 %D 2019 %R 10.15700/saje.v39n1a1550 %K APOS %K Cramer's rule %K parametric coefficients %K pre-service mathematics teachers %K system of linear equations %U http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0256-01002019000100009&lng=en&nrm=iso&tlng=en