Question

Please solve this :) first answer brainliest $1+1\\2+2\\4+4\\8+8$

Answer 1

Answer:

your answers

1+1 = 2

2+2=4

4+4 = 8

8+8 =16

Answer 2

Answer:

first three terms of ap = x, 2x+1 and 5x-1

since these are consecutive terms of the same ap, their common difference is same.

therefore,

2x+1 - x = 5x-1 - 2x - 1

x+1 = 3x-2

2x = 3

x = 3/2

therefore, first term = 3/2 second term = 2*3/2 + 1 = 4

common difference = 4 - 3/2 = 5/2

sum of fist ten terms = s10 = 10/2 [2*3/2 + 9*5/2]

5 [3 + 45/2]

5 [6+45/2]

5 [51/2]

255/2 = 127.5