- Prove that any two bases in R^n have the same number of vectors?

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Is three days enough to study for a calculous test? Help me to solve the following question!
Find integers x and y such that 57x+79y=17, and 400 Ayuda me sale error al intentar subir una foto a mi pregunta :((? Graph each function for the given domain 1. 3x-Y=1;D:{-3,-1,0,4} 2. F(x)=x+4;D:{-5,-3,0,4}? Chi mi sa spiegare questa dervata (ln^2x)/x dx?