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<span style="font-size:10.5pt;line-height:115%;font-family:"Nirmala UI","sans-serif";mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">ज्ञात<span style="font-size:10.5pt;line-height:115%;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA"> <span style="font-size:10.5pt;line-height:115%;font-family:"Nirmala UI","sans-serif";mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">कीजिए।<span style="font-size:10.5pt;line-height:115%;font-family:"Arial","sans-serif";mso-fareast-font-family:"Times New Roman";color:black;mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">
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<!--[endif]-->' href='chapter-5-सांतत्य-तथा-अवकलनीयता-(continuity-and-differentiability)-ex-5_5-solutions-1.aspx'>f(x) = (1 + x) (1 + x2) (1 + x4) (1 + x8)द्वारा प्रदत्त फलन का अवकलज ज्ञात कीजिए और इस प्रकार f'(1) ज्ञात कीजिए।



Answer -

दिया है, f(x) = (1 + x) (1 + x2)(1 + x4) (1 + x8)
दोनों पक्षों का लघुगणक लेने पर,
log f (x) = log [(1 + x) (1 + x2) (1 + x4) (1 + x8)]
या log f(x) = log (1 + x) +log (1 + x2) + log (1 + x4) + log (1 + x8)

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