Prove that \( { }^{n} \mathrm{P}_{r}={ }^{n} \mathrm{C}_{r}{ }^{r} ...
Prove that \( { }^{n} \mathrm{P}_{r}={ }^{n} \mathrm{C}_{r}{ }^{r} \mathrm{P}_{r} \)
E
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live
Other Videos By PW Solutions
| 2023-02-14 | A biologist studying the genetic code is interested to know the num... |
| 2023-02-14 | In the fig., we see that it has 4 horizontal blocks (or paths) and ... |
| 2023-02-14 | Consider two satellites \( A \) and \( B \) of equal mass, moving in the same circular orbit of ... |
| 2023-02-14 | Four particles, each of mass \( M \), move along a circle of radius \( R \) under the action of ... |
| 2023-02-14 | Show that \( \frac{(n+1)(n+2)(n+3) \ldots \ldots(n+r)}{r !} \) is a... |
| 2023-02-14 | Two spheres one of mass \( M \) has radius \( R \). Another sphere has mass \( 4 M \) and radius... |
| 2023-02-14 | Two neutron stars are separated by a distance of \( 10^{10} \mathrm{~m} \). They each have a mas... |
| 2023-02-14 | Prove that
\[
{ }^{n} \mathrm{C}_{r}{ }^{r} \mathrm{C}_{s}={ }^{n} ... |
| 2023-02-14 | निर्धारित कीजिए कि क्या निम्नलिखित प्रकार से
परिभाषित प्रत्येक संक्रिया \( * \) से एक द्विआधारी ... |
| 2023-02-14 | If \( m={ }^{n} C_{2} \), prove that \( { }^{m} C_{2}=3 \times{ }^{... |
| 2023-02-14 | Prove that \( { }^{n} \mathrm{P}_{r}={ }^{n} \mathrm{C}_{r}{ }^{r} ... |
| 2023-02-14 | Animal husbandry deals with
\( \mathrm{P} \)
(1) Only caring of liv... |
| 2023-02-14 | \( \mathrm{P} \)
Find the force of attraction on a particle of mass \( m \) placed at the centre... |
| 2023-02-14 | For the same total mass, which of the following will have the largest moment of inertia about an... |
| 2023-02-14 | Prove that \( { }^{n} \mathrm{C}_{r}+2^{n} \mathrm{C}_{r-1}+{ }^{n}... |
| 2023-02-14 | Find the linear inequalities for which the shaded region in the giv... |
| 2023-02-14 | . समुच्चय \( \{1,2,3,4,5\} \) में, निम्नलिखित संक्रिया
सारणी (सारणी \( 1.1 \) ) द्वारा परिभाषित ... |
| 2023-02-14 | Solve : \( \frac{x}{4}\frac{5 x-2}{3}-\frac{7 x-3}{5} \). |
| 2023-02-14 | Solve the following system of inequations :
\[
-2-\frac{x}{4} \leq ... |
| 2023-02-14 | Solve : \( 3 x+82 \) when :
\( x \) is a real number.
P |
| 2023-02-14 | Solve the following system of inequations :
\[
5 x-73(x+3), 1-\frac... |
0