Question

va rog mult!!!!!!!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

a^2 +b^2 = (a+b)^2 -2b = 5ab

(a+b)^2  = 7ab

log(c; (a+b)^2) = log(c ;7ab)

2log(c; (a+b)) = log(c; 7) +log(c; a) +log(c; b)

2log(c; (a+b)) -log(c; 7) = log(c; a) +log(c; b)

log(c; (a+b)) - log(c; 7)/2= (log(c; a) +log(c; b))/2

log(c; (a+b))/(1/2 *log(c; 7)) =  (log(c; a) +log(c; b))/2

log(c; (a+b))/(log(c; (7)^(1/2)) =  (log(c; a) +log(c; b))/2

log(c; (a+b))/(log(c; √7) =  (log(c; a) +log(c; b))/2