Target Mathematics
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Course

  • Add Math 0606
  • FPM 4PM1

Add Math 0606 topics

  • 1. Functions55
  • 2. Simultaneous equations and quadratics34
  • 2. Quadratic functions35
  • 3. Factors and polynomials61
  • 4. Equations, inequalities and graphs127
  • 5. Logarithmic and exponential functions86
  • 6. Straight-line graphs107
  • 7. Coordinate geometry of the circle6
  • 8. Circular measure68
  • 9. Trigonometry180
  • 10. Permutations and combinations55
  • 11. Series99
  • 12. Calculus — Differentiation 185
  • 13. Vectors51
  • 14. Calculus — Differentiation 261
  • 15. Calculus — Integration92
  • 16. Kinematics42
  • Indices and surds39

Study tools

  • Add Math 0606 overview
  • Formula summary
Additional Mathematics 0606 / Series / 3.47

3.47: GP with S3=17.5S_3=17.5S3​=17.5 and S∞=20S_\infty=20S∞​=20

0606/21/O/N/22 — Question 7 · 6 marks

· ·
The sum of the first three terms of a GP is 17.517.517.5 and S∞=20S_{\infty}=20S∞​=20. Find the first term and common ratio.
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← 3.45: GP fifteenth term and sum near infinity3.48: Triangle with surds; GP terms →
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