你如何使用产品规则区分f(x)= x ^ 3sqrt(x-2)sinx?
F'(x)= 3x ^ 2sqrt(x-2)sinx +(x ^ 3sinx)/(2sqrt(x-2))+ x ^ 3sqrt(x-2)cosx如果f(x)= g(x)h (x)j(x),则f'(x)= g'(x)h(x)j(x)+ g(x)h'(x)j(x)+ g(x)h(x )j'(x)g(x)= x ^ 3 g'(x)= 3x ^ 2 h(x)= sqrt(x-2)=(x-2)^(1/2)h'(x )= 1/2 *(x-2)^( - 1/2)* d / dx [x-2]颜色(白色)(h'(x))=(x-2)^( - 1/2 )/ 2 * 1颜色(白色)(h'(x))=(x-2)^( - 1/2)/ 2颜色(白色)(h'(x))= 1 /(2sqrt(x-) 2))j(x)= sinx j'(x)= cosx f'(x)= 3x ^ 2sqrt(x-2)sinx + x ^ 3 1 /(2sqrt(x-2))sinx + x ^ 3sqrt (x-2)cosx f'(x)= 3x ^ 2sqrt(x-2)sinx +(x ^ 3sinx)/(2sqrt(x-2))+ x ^ 3sqrt(x-2)cosx
你如何使用产品规则区分f(x)=(5e ^ x + tanx)(x ^ 2-2x)?
F'(x)=(5e ^ x + sec ^ 2x)(x ^ 2-2x)+(5e ^ x + tanx)(2x-2)对于f(x)=(5e ^ x + tanx)(x ^ 2-2x),我们通过这样做找到f'(x):f'(x)= d / dx [5e ^ x + tanx](x ^ 2-2x)+(5e ^ x + tanx)d / dx [x ^ 2-2x] f'(x)=(5e ^ x + sec ^ 2x)(x ^ 2-2x)+(5e ^ x + tanx)(2x-2)
你如何使用产品规则区分f(x)=(x ^ 2 + 2)(x ^ 3 + 4)?
F'(x)= 5x ^ 4 + 6x ^ 2 + 8x f'(x)= 2x xx(x ^ 3 + 4)+ 3x ^ 2 xx(x ^ 2 + 2)f'(x)= 2x ^ 4 + 8x + 3x ^ 4 + 6x ^ 2 f'(x)= 5x ^ 4 + 6x ^ 2 + 8x