9000060606 | math4u.vsb.cz

SubArea:

Arithmetic sequences

Level:

Project ID:

9000060606

Source Problem:

Accepted:

1

Clonable:

1

Easy:

0

Identify the real number

x

which ensures that the numbers

a_{1} = 5 x + 1

,

a_{2} = x

and

a_{3} = 7 x + 3

are three consecutive terms of an arithmetic sequence.

x = - 0.4

x = 0.4

x = 2.5

x = - 2.5

x = 5