# Complementary Combination Quiz Questions and Answers PDF Download eBook - 124

Complementary Combination quiz questions and answers, complementary combination MCQs with answers PDF 124 to practice math mock tests for online graduate programs. Practice "Permutations, Combinations and Probability" quiz questions with answers, complementary combination Multiple Choice Questions (MCQs) for online college degrees. Free complementary combination MCQs, online math learning, double angle identities, composition of functions, fourth root of unity, complementary combination test prep for best online colleges for teaching degree.

"The value of ^{n-1}C_{r} + ^{n-1}C_{r-1} is", complementary combination Multiple Choice Questions (MCQs) with choices * ^{n-1}c_{r}, ^{n+1}c_{r}, ^{n}c_{r-1}, and ^{n+1}c_{r+1}* for SAT subject test tutoring. Practice permutations, combinations and probability questions and answers to improve problem solving skills for online college courses.

## Quiz on Complementary Combination PDF Download eBook

MCQ: The 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

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

- −ι
- ι²
- −1
- None of Above

B

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

MCQ: Cos2α =

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

A

MCQ: Cos7θ-cosθ =

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

B