Question

sum of first 9 terms of an arithmetic sequence is 45 and sum of first 18 terms is 171.
a)what is sum of the 10 to 18 terms of this sequence?
b)what is it's 5th term?
c)14th term?
d)sum of 5 to 14 terms of the sequence? ​

Answer 1

Answer:

) What is the sum of its \[{10^{th}}\] to \[{18^{th}}\] terms? (b) What is its \[{5^{th}}\] term? (c) Find its \[{14^{th