Grade 12Algebra
answer please...........................................????????????????????
answer please...........................................????????????????????
1 Answer
Rajat
Approved Tutor Answer7 Years agoSum of series= 3(12)/3+ 6(12+22)/5 +
9(12+22+32)/7 +.....
Tk= 3k(12+22+...k^2)/(2k+1)
= 3k(2k+1)(k)(k+1)/6(2k+1)
= k^2(k+1)/2 =1/2(k^3+k^2)
Sum of series = 1/2{(12+22....+k^2) +(13+23...+k^3)}
=1/2{(2k+1)(k)(k+1)/6 + (k(k+1)/2)^2}
=1/2{(31×15×16/6)+(15×16/2)2}
= 7820
Other Related Questions on algebra
How do you write “the product of 18 and q” as an algebraic expression?
How do you write “the product of 18 and q” as an algebraic expression?
algebra
Last Activity: 2 Years ago