Asked by jaylan talib

the ninth term of an arithmetic progression is 52ind the and the sum of the first twelve terms is 414.find the first term and the common difference.
Answered by Reiny
a + 8d = 52

(12/2)(2a + 11d) = 414
or
2a + 11d = 69

solve these two equations for a and d
Answered by h
d=69&a1=2
Answered by BIG MAN
ur dumb