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Ex 12 va rog frumos.....

Ex 12 Va Rog Frumos class=

Răspuns :

(3⁴)⁵ˣ :(9³ la ²×3)ˣ=81
(3²⁰ˣ :(9⁹×3)ˣ=3⁴
3²⁰ˣ :(3¹⁸×3)ˣ=3⁴
3²⁰ˣ :3¹⁹ˣ=3⁴
3ˣ=3⁴
x=4  deci A={4}

x+2x+3x+....+11x=264
x(1+2+...+11)=264
x×11×12/2=264
x×66=264
x=264/66
x=4   deci B={4}

deci "A=B" este adevarata