the 5th term of an a.p is 1 and the 11th term is -17 .which term of the ap. is.- 77
Answers
Answered by
1
a+4d=1 ....(i)
a+10d=-17......(ii)
a^n=-77
hence
a+(n-1)d =a^n
solving (i) and (ii)
we get
a=13 and d=-3
then
13+(n-1)(-3)=-77
16-3n=-77
-3n=-93
n=31
a+10d=-17......(ii)
a^n=-77
hence
a+(n-1)d =a^n
solving (i) and (ii)
we get
a=13 and d=-3
then
13+(n-1)(-3)=-77
16-3n=-77
-3n=-93
n=31
Similar questions