Question

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Find S5 for the sequence 3, 13, 23, 33, 43, 53, 63, 73.

Answer 1

Answer: B) 115

Explanation:

S₅ means the sum of the first 5 terms.

3 + 13 + 23 + 33 + 43 = 115

You can also use the formula:

`S_n=(a_1+a_n)/(2)* n\\\\.\quad =(3+43)/(2)* 5\\\\.\quad =(46)/(2)* 5\\\\.\quad =23* 5\\\\.\quad =115`