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Transcended Engineering
Determining if a multivariable function is continuous at (a , b)
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Hoang Giang Share
Janusz
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![Prove that |[a - b - c, 2a, 2a],[2b, b - c - a, 2b],[2c, 2c, c - a - b]| = (a + b +c)^3](http://i.ytimg.com/vi/F6Kll3fQIB0/mqdefault.jpg "Prove that |[a - b - c, 2a, 2a],[2b, b - c - a, 2b],[2c, 2c, c - a - b]| = (a + b +c)^3")
![Prove that |[1 +a^2 -b^2, 2ab, -2b],[2ab, 1-a^2 +b^2, 2a],[2b, -2a, 1-a^2 -b^2]| = (1 + a^2 + b^2)^3](http://i.ytimg.com/vi/B7UwIYXEcX8/mqdefault.jpg "Prove that |[1 +a^2 -b^2, 2ab, -2b],[2ab, 1-a^2 +b^2, 2a],[2b, -2a, 1-a^2 -b^2]| = (1 + a^2 + b^2)^3")
![If a, b, c are in A. P. then determinant |[x+2, x+3, x+2a],[x+3, x+4, x+2b],[x+4, x+5, x+2c]|](http://i.ytimg.com/vi/bxjhfOHzYjE/mqdefault.jpg "If a, b, c are in A. P. then determinant |[x+2, x+3, x+2a],[x+3, x+4, x+2b],[x+4, x+5, x+2c]|")
