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3*16 la puterea X +2 *81 la puterea X = 5 * 36 la puterea X!!!!
Va rog!!!
Dau coroana!



Răspuns :

3·2⁴ˣ+2·3⁴ˣ=5 ·2²ˣ· 3²ˣ se imparte prin 2²ˣ si 3²ˣ
3 ·(2/3)²ˣ+2 ·(3/2)²ˣ=5
(2/3)²ˣ=y
3y+2/y=5
3y²-5y+2=0
Δ=1
√Δ=1
y₁=1
y₂=2/3

(2/3)²ˣ=y₁
(2/3)²ˣ=(2/3)⁰
2x=0
x=0

(2/3)²ˣ=y₂
(2/3)²ˣ=(2/3)
2x=1
x=1/2