Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Find the last term of a 10 term AP, whose first few terms are: 2a-b,4a-3b,6a-5b.....Option: 1 18a-17bOp

Find the last term of a 10 term AP, whose first few terms are: 2a-b,4a-3b,6a-5b.....

Option: 1

18a-17b


Option: 2

19a-18b


Option: 3

20a-19b


Option: 4

21a-20b


Answers (1)

best_answer

Last term of an A.P. with n terms is

l= a+(n-1)d

In this Question,

 T_{10}=a+(10-1)d

=2a-b+9*((4a-3b)-(2a-b))

=2a-b+9*(2a-2b)

=2a-b+18a-18b

=20a-19b

 

 

Posted by

Riya

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2026: IIT Hyderabad AI cut-off rises for open, SC, ST; CSE sees dip in closing ranks
anam-khan

JEE Main 2026: NIT Tiruchirappalli, Surathkal, Warangal retain highest BTech cut-offs among NITs
anam-khan

JEE Main 2026: IIT Bombay Aerospace Engineering closing ranks fall steadily; course-wise seat matrix

Latest Question