Question

Sum the following series to n terms 3+5+9+15+23+----​

Answer 1

Answer:

according to question :-

3+2 = 5

5+4 = 9

9+6 = 15

15+8 = 23

23+10 = 43 Answer

hope you understand plz mark it as brainliest

Answer 2

Given AP: 3 , 5 , 9 , 13 ....... where

• a = 3
• d = 4
• n = n terms.

Thus sum of all terms i.e. Sn = n/2 [ 2a + (n-1)d ]

Sn =

• (n/2)[2(3) + (n-1)4]
• (n/2)[6 + 4n -4]
• (n/2)(2n-4)
• (2)(n/2)(n-2)
• n(n-2)
• n² - 2n

Thus the sum of n terms of the given expression is n² - 2n for any natural number n.

#answerwithquality

#BAL