The 4th term of an arithmetic progression is 15, 15th term is -29, find the 10th term?
Answers
Answered by
5
Answer: -9
given:- a4=15 [n=4]
a15= -29 [n=15]
a10=? [n=10]
using formula: [a+(n-1)d]
a4= a+3d=15------(1)
a15= a+14d= -29 ---------(2)
sub (2)-(1)=
11d=-44 hence d= -4 (sub in eq 1)
a=27
hence, a10= a+(n-1)d= a+9d
= 27+9(-4) = 27-36= -9
hope it helps u !! press thanks! :)
Similar questions