Question

the the sum of n terms of an arithmetic sequences 3n square plus 5nand the m term is 169.find the value of n​

Answer 1

Answer:

so the answer is

Step-by-step explanation:

(3n) +5=169

3*n+5=169

9*n+5=169

n*45=169

n=169/45=169

n=3.75