Răspuns:
a) 2^x < 16
2^x < 2^4
x<4
x=0, 1, 2, 3
b) 8<= 2^x<64
2^3<=2^x<2^6
3<=x<6
x=3, 4, 5
c) 2^9<2^x<2^13
9<x<13
x=10, 11, 12
d) 13<=2^x<75
(2^3 + 5) <= 2^x<(2^6 + 11)
x=4, 5, 6
e) 3^x<29
3^x< (3^3) + 2
x=0, 1, 2, 3
f) 7<=3^x<80
(3^1 + 4) <= 3^x<(3^3 + 54)
x= 2, 3
g) 3^9<9^x<=3^14
3^9<3^(x+1)<=3^14
x=9, 10, 11, 12, 13
h) 2^7<=4^x<2^18
2^7<=2^(x+1)<2^18
x=6, 7, 8, 9, 10, 11....16
