Dr. J's Maths.com
Where the techniques of Maths
are explained in simple terms.

Sequences & Series - Geometric - Summation questions.
Test Yourself 1 - Solutions.


 

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S1 = T1 = 9

S2 = T1 + T2 = 25 - so T2 = 16

S3 = 50 = S2 + T3 - so T3 = 25

The first three terms in the series are
9, 16 and 25.

  
Finding the sum.    
 

 

  
Finding a term. 7. 8.
  9.  
     
     
Finding the number of terms. 15. 16.
     
     
Miscellaneous - finding more than one value. 21. 22.
     
     
Challenging 23.