Question

求f（x）=2^x2+lncos（2x）的导数

Answer 1

f'(x)=2^x²·ln2·(x²)'+[1/cos(2x)]·[cos(2x)]'

=2^x²·ln2·2x+[1/cos(2x)]·[-sin(2x)]·(2x)'

=2^x²·ln2·2x+[1/cos(2x)]·[-sin(2x)]·2

=2^x²·ln2·2x-2tan2x