Ask a New Question

Question

the first term of an arthmetic progression is 1 and its last term is 28, find the sum of the progression if their number is 10
14 years ago

Answers

Reiny
a=1
n=10
a+ 9d = 28
9d = 27
d = 3

sum(10) = 10/2(first + last) = 5(1+28) = 145
14 years ago

Related Questions

Long-Term and Short-Term Financing find the sum of arthmetic progression 12,15,18,,,,,, 84, a=12 d=3 n=? Given the arthmetic sequence 2 old no 1 all over 2, 1,...., 71, find the common difference. in an arthmetic progression or series,the 13th term is 27 and the 7th iterm is 3 times the 2nd term... In an arthmetic sequence, the fourth term is 84 and the tenth term is 60. Find the maximum possible... The 3rd term of arthmetic sequence is 3/4th of 6th term.and their sum is 60.find a,d and nth term. Short term and long term consequences of sharpville Short-term and long-term goals are related in what way? Long-term goals must be set first and are... Short-term and long-term consequences of imperialism. easys imple answer no big words
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use