Question

Find the number of terms common to the two arithmetic progressions
5,9, 13, 17, ..., 217 and 3,9, 15, 21, ..., 321.​

Answer 1

Answer:

213,315

Step-by-step explanation:

5+4=9,9+4=13,13+4=17.....

so,217-4=213

3+6=9,9+6=15,15+6=21.....

so,321-6=351