Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
2.6k views
in Mathematics by (150k points)

If a1 , a2 , ..., an are in H.P., then the expression a1 a+ a2 a3 + ... + an – 1 an is equal to

(a) n(a1 – an

(b) (n – 1)(a1 – an )

(c) na1an 

(d) (n – 1)a1an.

1 Answer

+1 vote
by (87.2k points)
selected by
 
Best answer

(d) : Given a1, a2,... an are in H.P.

∴ a1a2 + a2a3 + ... an – 1an = (n – 1)a1an .​

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...