If A - 2 10- 21 1 - B - -2 0- 4 5 - then find 2 A - B-

2A=2[ 2 amp;10; 21 amp;1 ] =[ 4 amp;20; 42 amp;2 ] 2A+B=[ 4 amp;20; 42 amp;2 ]+[ 2 amp;0; 4 amp;5 ] =[ 2 amp;20; ...

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Equality of Matrices

If A =[[ 2 10...

Question

If A = $[\begin{matrix} 2 & 10 21 & 1 \end{matrix}]$ , B = $[\begin{matrix} - 2 & 0 4 & 5 \end{matrix}]$ then find 2A + B.

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If $A = [\begin{matrix} 1 & 2 - 2 & 9 \end{matrix}]$ , then -2A=_______________

\frac{2 a}{a + b} + \frac{2 b}{b + c} + \frac{2 c}{c + a} + \frac{(b - c) (c - a) (a - b)}{(b + c) (c + a) (a + b)} = 3

∣ ∣ ∣ ∣ \begin{matrix} a - b - c & 2 a & 2 a 2 b & b - c - a & 2 b 2 c & 2 c & c - a - b \end{matrix} ∣ ∣ ∣ ∣

= (a + b + c) (x + a + b + c)^{2}, x \neq 0

a + b + c \neq 0

x

|\begin{matrix} a + b + c & - c & - b \\ - c & a + b + c & - a \\ - b & - a & a + b + c \end{matrix}| = 2 (a + b) (b + c) (c + a)

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