Tlng bntu jwb ya mksih

a).(1/3)^a = 1/7
a = 1

b).(1/4)^a = 1/64
a = 3

c).2^a = 128
a = 7

d).a^2 = 49
a = √49
a = 7

e).(2/9)^a = 4/81
a = 2