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\(\log _{10} x\) का \(x^{3}\) के सापेक्ष अवकलन करें।

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मान लें \(y=\log _{10} x\) और \(z=x^{3},\) अब \(\frac{d y}{d z}\) निकालना है।

यहाँ \(y=\log _{10} x=\log _{10} e \cdot \log _{e} x,\)

\(\therefore \quad \frac{d y}{d x}=\log _{10} e \cdot \frac{1}{x};\) फिर \(\frac{d z}{d x}=3 x^{2},\)

\(\therefore \quad \frac{d y}{d z}=\frac{\frac{d y}{d x}}{\frac{d z}{d x}}=\frac{\log _{10} e \cdot \frac{1}{x}}{3 x^{2}}=\frac{\log _{10} e}{3 x^{3}}.\)

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