Решить уравнения
1) (2^3+1)*2^x-3=72 (8+1)*2^x-3=72 9*2^x-3=72 2^x-3=8 2^x-3=2^3 x-3=3 x=3+3 x=6 2) (1+5^2)*5^x=130 (1+25)*5^x=130 26*5^x=130 5^x=5 5^x=5^1 x=1
2^x + 2^(x - 3 ) = 72 2^x * ( 1 + ( 1/8 )) = 72 2^x = 72 : ( 9/8 ) 2^x = 64 2^x = 2^6 x = 6 -------------------------------- 5^x + 5^( x + 2 ) = 130 5^x * ( 1 + 25 ) = 130 5^x = 130 : 26 5^x = 5 x = 1