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你如何使用链规则区分f(x)= sqrt(ln(x ^ 2 + 3)。
F'(X)=(X(LN(X ^ 2 + 3))^( - 1/2))/(X ^ 2 + 3)= X /((X ^ 2 + 3)(LN(X ^ 2 + 3))^(1/2))= x /((x ^ 2 + 3)sqrt(ln(x ^ 2 + 3)))我们给出:y =(ln(x ^ 2 + 3) )^(1/2)y'= 1/2 *(ln(x ^ 2 + 3))^(1 / 2-1)* d / dx [ln(x ^ 2 + 3)] y'=( ln(x ^ 2 + 3))^( - 1/2)/ 2 * d / dx [ln(x ^ 2 + 3)] d / dx [ln(x ^ 2 + 3)] =(d / dx [x ^ 2 + 3])/(x ^ 2 + 3)d / dx [x ^ 2 + 3] = 2x y'=(ln(x ^ 2 + 3))^( - 1/2)/ 2 *(2×)/(X ^ 2 + 3)=(X(LN(X ^ 2 + 3))^( - 1/2))/(X ^ 2 + 3)= X /((X ^ 2 + 3)(LN(X ^ 2 + 3))^(1/2))= X /((X ^ 2 + 3)SQRT(LN(X ^ 2 + 3)))
你如何使用链规则区分f(x)=(x ^ 3-2x + 3)^(3/2)?
3/2 *(sqrt(x ^ 3 - 2x + 3))*(3x ^ 2 - 2)链规则:d / dx f(g(x))= f'(g(x))* g' (x)幂规则:d / dx x ^ n = n * x ^(n-1)应用这些规则:1内部函数,g(x)是x ^ 3-2x + 3,外部函数,f (x)是g(x)^(3/2)2使用幂定律d / dx(g(x))^(3/2)= 3/2 * g(x)取外部函数的导数^(3/2 - 2/2)= 3/2 * g(x)^(1/2)= 3/2 * sqrt(g(x))f'(g(x))= 3/2 * sqrt(x ^ 3 - 2x + 3)3取内函数的导数d / dx g(x)= 3x ^ 2 -2 g'(x)= 3x ^ 2 -2 4乘以f'(g(x ))与g'(x)(3/2 * sqrt(x ^ 3 - 2x + 3))*(3x ^ 2 - 2)溶液:3/2 *(sqrt(x ^ 3 - 2x + 3)) *(3x ^ 2 - 2)
你如何使用链规则区分f(x)= sin(tan(5 + 1 / x)-7x)?
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