Problema Solution
in the arithmetic progression,98,91,.....,0.find (a).the common difference.(b)the number of terms in the progression
Answer provided by our tutors
AP: 98, 91,....,0
so, common difference is 91-98 = -7
last term=0 , first term= 98 and d= -7
then
0= 98+(n-1)(-7)
-98= (n-1)(-7)
n-1= 14
so, n=15
hence, a) common difference is -7
and number of terms= 15