D=5, a10=48. find a45

223

Step-by-step explanation:

it is an arithmetic sequence and we will use this formula an = a1 + (n-1) d now first we will find a1 a10 = a1 + (10-1) d 48 = a1 + 9*5 after simplify a1=3 now using again this formula we can easily find a45 a45 = 3 + (45-1) 4=223