Question

If 2x, 4x+4 and 8x-4 form an arithmetic sequence, what is x?​

Answer 1

Answer:

x=6

Step-by-step explanation:

If a, b, and c are in A.P.(arithmetic sequence), Then we can write => 2×b = a + c (for proof write b = a+d, and c = a+2d)

1. Using this formulation we get thet 2×(4x+4) = 2x + 8x-4
2. 8x+8 = 10x-4
3. 12 = 2x
4. x=6

Hope you find the answer helpful, if you have any doubt ask in the comments