# Complementary Combination Quiz Questions and Answers 124 PDF Download

Learn complementary combination quiz online, college math test 124 for online learning, distance learning courses. Free complementary combination MCQs questions and answers to learn math quiz with answers. Practice tests for educational assessment on complementary combination test with answers, online math learning, double angle identities, composition of functions, fourth root of unity, complementary combination practice test for online fun mathematics courses distance learning.

Free online complementary combination course worksheet has multiple choice quiz question: value of ^{n-1}c_{r} + ^{n-1}c_{r-1} is with choices ^{n+1}c_{r}, ^{n-1}c_{r}, ^{n}c_{r-1} and ^{n+1}c_{r+1} for scholars to prepare for online study guide questions and answers to improve study skills, study permutations, combinations & probability multiple choice questions based quiz question and answers.

## Quiz on Complementary Combination Worksheet 124 Quiz PDF Download

Complementary Combination Quiz

MCQ: Value of ^{n-1}C_{r} + ^{n-1}C_{r-1} is

^{n+1}C_{r}^{n-1}C_{r}^{n}C_{r-1}^{n+1}C_{r+1}

B

Fourth Root of Unity Quiz

MCQ: One root of equation x² + 1 = 0 is ι other is

- −ι
- ι²
- −1
- None of Above

B

Composition of functions Quiz

MCQ: If ƒ(x) = √(cot^{-1}x and g(x) = lnx,then (fog)(x) =

- ln(cot
^{-1}x) - 1/2 ln(cot
^{-1}x) - cot
^{-1}(lnx) - √(cot
^{-1}(lnx)

D

Double Angle Identities Quiz

MCQ: Cos2α =

- cos²α - sin²α
- 2sin²α +1
- 2sin²α -1
- 2cos²α +1

A

Online Math Learning Quiz

MCQ: Cos7θ-cosθ =

- 2sin4θsin3θ
- −2sin4θsinθ
- −2sin4θcosθ
- 2sin4θcosθ

B