Find the sum of all integers between 50 and 500, which are multiples of 7.
a = 56, d = 7, l = 497
n = 
+ 1
= 
+ 1
= 
+ 1 = 
= 64
S64= 
(a + l)
= 32 (56 + 497)
= 32 (553) = 17696
16
Find the sum of all integers between 50 and 500, which are multiples of 7.
a = 56, d = 7, l = 497
n = + 1
= + 1
= + 1 =
= 64
S64= (a + l)
= 32 (56 + 497)
= 32 (553) = 17696