Question

y=2(50-x)+4√(100+x2)的导数为y'=-2+4x/√()100+x2)

Answer 1

y = 2(50 – x)+ 4√(100+ x 2 ) = 100 – 2x + 4√(100+ x 2 ) = 100 – 2x + 4(100 + x 2 ) 1/2 ,求导可得 y’ = -2 + 4*(1/2)*(100 + x 2 ) -1/2 *(100+ x 2 )’ = -2 + [2/√(100 + x 2 )]*2x = -2 + 4x/ √(...