how many multiplies of 4 lie between 10 and 250 . also find their sum.
Answers
Answered by
3
a = 12
d = 4
L = 248
=> a +(n-1)d = 248
=> 12 + (n-1)d = 248
=> (n-1) 4 = 236
=> n-1 = 59
=> n = 60
S60 = 60 / 2[ 2*12 + 59 * 4]
= 30 * (24 + 236)
= 30 * 260
= 7800
d = 4
L = 248
=> a +(n-1)d = 248
=> 12 + (n-1)d = 248
=> (n-1) 4 = 236
=> n-1 = 59
=> n = 60
S60 = 60 / 2[ 2*12 + 59 * 4]
= 30 * (24 + 236)
= 30 * 260
= 7800
Answered by
2
Terms (n) is 60
Sum of 60 terms is 7800
Sum of 60 terms is 7800
Attachments:
Similar questions