Question

高一指数函数题

1.已知y=f(x）是指数函数。若f(-2/3)=4^1/3，则f(-1/2)=

Answer 1

f(-2/3)=4^1/3=(1/2)^(-2/3)
即：f(x)==(1/2)^x
f(-1/2)=根号2

Answer 2

f(-2/3)=4^1/3=2^(2/3)
y=f(x）=2^x
y=f(-1/2)=2^(-1/2)=√2/2