1. (4/5)^(2x + 6) = (4/5) ^ (-6)
2x + 6 = -6
x = -6
2. (7 ^ (x-1)) * (3 * 7² + 5) = 152
(7 ^ (x-1)) * 152 = 152
<span>7 ^ (x-1) = 1
</span><span>7 ^ (x-1) = 7 ^ 0
x -1 = 0
x = 1
3). 4 ^ x = t
2t</span>² - 17t + 8 = 0
D = 289 - 64 = 225
t = 8 или t = 1/2
4^x =8 4^x = 1/2
2 ^ (2x) = 2³ 2^(2x) = 2^(-1)
2x = 3 2x = -1
x=3/2 x = -1/2
130+130=260 (100+70)+100=270 (20+50)+(40+60)=170 100-(120-80)=60 56+(78+40)=174
(200-120)+81=161 (40-40)+(60-20)=40
Вот. .. если правильно поняла условие
в 1 кг - 1000г, 1000/5 = 200. 12х200 = 2400 желудей.