f(x)=(1+2∧x)²/2∧x 判断奇偶性?

f(x)=(1+2∧x)²/2∧x 判断奇偶性?
f(x)=(1+2∧x)²/2∧x 判断奇偶性?

f(x)=(1+2∧x)²/2∧x 判断奇偶性?
f(-x)=(1+2^-x)^2/2^-x
=(1+1/2^x)^2*2^x
=2^x+1/2^x+2
=f(x)
把f(x)展开 发现f(-x)=f(x)
所以是偶函数