Question
Download Solution PDFlog (x + 3) + log (x + 5) = log 35, x का मान ज्ञात कीजिए:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
log (x + 3) log (x + 5) = log 35
प्रयुक्त सूत्र:
यदि log(a) log(b) = log(c) है, तो
गणना:
log (x + 3) log (x + 5) = log 35
⇒ log (x + 3) log (x + 5) = log 5 × log 7
⇒ (x + 3) (x + 5) = 35
⇒ x2 + 8x + 15 = 35
⇒ x2 + 8x - 20 = 0
⇒ (x + 10)(x - 2) = 0
⇒ x = -10 या x = 2
चूँकि x धनात्मक होना चाहिए, इसलिए x = 2
इसलिए, सही उत्तर विकल्प (2) है।
Last updated on Jun 12, 2025
-> NIELIT Scientific Assistant city intimation slip 2025 has been released at the official website.
-> NIELIT Scientific Assistant exam 2025 is scheduled to be conducted on June 28.
-> A total number of 113 revised vacancies have been announced for the post of Scientific Assistant in Computer Science (CS), Information Technology (IT), and Electronics & Communication (EC) streams.
-> Online application form, last date has been extended up to from 17th April 2025.
->The NIELT has revised the Essential Qualifications for the post of Scientific Assistant. Candidates must possess (M.Sc.)/ (MS)/ (MCA) / (B.E.)/ (B.Tech) in relevant disciplines.
-> The NIELIT Scientific Assistant 2025 Notification has been released by the National Institute of Electronics and Information Technology (NIELIT).