Question

if the term to term rule is multiply by 2 and add three and the third term is 17 what is the first term?

Answer 1

Answer:

the first term is 2

Step-by-step explanation:

As the term to term rule of another sequence is:

Multiply by 2 and add 3.

So

if

3rd term =  17                        

then

4th term = 17×2 + 3 = 37      

5th term = 37 ×2 + 3 = 77    

6th term = 77 ×2 + 3 = 157    

7th term = 157 ×2 + 3 = 317

following this pattern

3rd term = 7×2  +3 = 17

2nd term = 2 ×2 +3 = 7

1st term = -0.5 ×2 +3 = 2