Show that the sequence 9, 12, 15,18 is an AP. Find it's 16th term and the general term ?

57

Step-by-step explanation:

Ok so if I can remember it goes this way

Find the common term:

12-9=3

18-15=3

Common term: 3

Take the first number of the sequence: 9

First number of sequence + common term * the term you want

9+3*16=57

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.