the 9th and 22nd terms of an A.P are 29 and 55,respectively.find the sum of its first 10 term
3 answers
yeah
yes
13d = 55-29
d = 2
so a = 29-8*2 = 13
S10 = 10/2 (2a+9d)
d = 2
so a = 29-8*2 = 13
S10 = 10/2 (2a+9d)
12 answers