Skip to content
MathsGenie logo
Quick links
Open app

Course home

  1. A Level
  2. Maths AQA
  3. Question bank

1.7.5 Geometric sequences and series (A-level only)

EasyMedium
1234567891011121314151617181920212223242526272829303132333435363738394041424344
Question 36

The total net flux of a pulsating radiation source is modeled as the sum to infinity of a geometric series, PPP. This sum is measured to be 7.5 units.

A phase-inverted secondary source is monitored where each discrete flux pulse, jnj_njn​, is related to the corresponding pulse in the first source, ini_nin​, by the linear relationship jn=−2.4inj_n = -2.4 i_njn​=−2.4in​ for all n≥1n \ge 1n≥1.

Determine the total net flux of the secondary radiation source.

[3]

1.7.5 Geometric sequences and series (A-level only) Questions

  1. A Level
  2. /Maths
  3. /1.7.5 Geometric sequences and series (A-level only)