Answer:
a) 23, 47 b) 2
Step-by-step explanation:
a) It gives you the pattern, so you can use it to find the next two terms:
11 x 2 + 1 = 22 + 1 = 23
23 x 2 + 1 = 46 + 1 = 47
b) It gives you the pattern, so you can use it to find the first term:
Work backwards this time because you need to find what comes before the 17.
? x 2 + 3 = 17
? x 2 = 17 - 3
? x 2 = 14
? = 14 ÷ 2
? = 7
7 is the second term. Find the first term:
? x 2 + 3 = 7
? x 2 = 7 - 3
? x 2 = 4
? = 4 ÷ 2
? = 2
The first term is 2.
