Created by StemPy LabThe positive real numbers and satisfy , and otherwise they can be chosen freely. Which of the following statements about greatest and least values are true?
One or more options are correct. Tick all the correct ones: a wrong option costs marks, and a part-right answer earns part of the marks.
← All Quizzes
← The nonzero real numbers a, b and c are three consecutive terms of a geometric progression with common ratio r, and a, 2b and 3c are three consecutive terms of an arithmetic progression. Which of the following statements are true?Find the sum 2 · 1² + 3 · 2² + 4 · 3² + … + 21 · 20², where the kth term is (k + 1)k². You may use the standard formulas for Σ k² and Σ k³. →
Discussion (0)
Log in to join the discussion.
Loading…