plz answer fast its important right answers will be marked as brainilist
Share
plz answer fast its important right answers will be marked as brainilist
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Step-by-step explanation:
HOPE it will help you ✌️
Step-by-step explanation:
AP : 7, 11, 15, 19, . . .
a = 7
d = 4
n = 20
Sn = n/2 { 2a + ( n-1)d}
= 20/2 { 2×7 + ( 20-1)4}
= 10 { 14 + (19)4}
= 10 { 14 + 76 }
= 10 { 90}
= 900
Thus, sum of 20 terms = 900
HOPE IT'S HELPFUL...
PLEASE MARK ME AS BRAINLIST...