Find the sum of the first 5 terms of the geometric sequence with first term and common ratio .

Answer and explanation

Correct answer: B. 155

  1. Step 1: . Step 2. . Answer: 155. Why not the others: 160: That is the next term, not the sum. 80: That is the last term, not the sum. 150: That leaves out the first term.

Practise more Sequences, trigonometry, probability and matrices.

Free questions with an explanation for every one, and full timed Tawjihi (Palestinian General Secondary Examination), Scientific Stream mock tests.