the sum of the third and ninth term of an A.P. is 8. find the sum of the first 11 terms of the progression
Answers
Answered by
3
a+2d+a+8d=8
=>a+5d=4
S11=(11/2)(2a+10d)
=>11(4)=44
=>a+5d=4
S11=(11/2)(2a+10d)
=>11(4)=44
Similar questions