Sarthaks APP
0 votes
2.7k views
in Mathematics by (128k points)

Please log in or register to answer this question.

1 Answer

+1 vote
by (10.7k points)
Let 1st term of AP be a

Its common difference

d = 3rd term - 2nd term = 18-14=4

So  a+d =14=> a=14-4=10

Sum of first 51 terms =51/2(2*10+(51-1)*4)

= 51×110=5610

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

...