PLEASE HELP Find common difference

d =

Step-by-step explanation:

The n th term of an arithmetic sequence is

= a₁ + (n - 1)d

where a₁ is the first term and d the common difference , thus

a₇ = a₁ + 6d

a₄ = a₁ + 3d

Given a₇ - 2a₄ = 1 , then

a₁ + 6d - 2(a₁ + 3d) = 1, that is

a₁ + 6d - 2a₁ - 6d = 1

- a₁ = 1 ( multiply both sides by - 1 )

a₁ = - 1

Given a₃ = 0 , then

a₁ + 2d = 0 , thus

- 1 + 2d = 0 ( add 1 to both sides )

2d = 1 ( divide both sides by 2 )

d =

. + λrh() e 1 1 2 4 4 4 4 4 3 4 4 4 4 4 + th−1(− s(x)2 dx ω + λrh−1() e 2 1 2 4 4

step-by-step explanation: