सिद्ध कीजिए कि- \[ { }^{n} C_{r}+2 \times{ }^{n} C_{r-1}+{ }^{n} C_{r-2}={ }^{n+2} C_{r} \]
सिद्ध कीजिए कि-
\[
{ }^{n} C_{r}+2 \times{ }^{n} C_{r-1}+{ }^{n} C_{r-2}={ }^{n+2} C_{r}
\]
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live
Other Videos By PW Solutions
| 2022-11-30 | 200 million years ago, the dominant flora of the earth was of:
(A) Archaebacteria
(B) Mosses and... |
| 2022-11-30 | Greatest producers of organic matter are:
(A) Forests
(B) Phytoplankton of oceans
(C) Plants of ... |
| 2022-11-30 | Which of the following have high \( \mathrm{CO}_{2} \) compensation point?
(A) Alpine herbs
(B) ... |
| 2022-11-30 | The first product of \( \mathrm{CO}_{2} \)-fixation in \( \mathrm{C}_{4} \)-plants is:
(A) Oxalo... |
| 2022-11-30 | What will happen if the supply of oxygen is decreased to an illuminated wheat plant?
(A) Its pho... |
| 2022-11-30 | According to Blackman'slaw of limiting factor, at any given time, photosynthesis can be limited ... |
| 2022-11-30 | Name the anatomical layer in the root from which the lateral branch of root arises. |
| 2022-11-30 | Which one of the following would not be limiting factor in photosynthesis?
(A) Light
(B) \( \mat... |
| 2022-11-30 | यदि \( { }^{2 n} C_{3}:{ }^{n} C_{2}=12: 1 \), तो \( n \) का मान ज्ञात कीजिए। |
| 2022-11-30 | यदि \( { }^{n_{13}}:^{n+1} P_{12}=3: 4 \), तो \( { }^{n} C_{1} \) का मान ज्ञात कीजिए। |
| 2022-11-30 | सिद्ध कीजिए कि- \[ { }^{n} C_{r}+2 \times{ }^{n} C_{r-1}+{ }^{n} C_{r-2}={ }^{n+2} C_{r} \] |
| 2022-11-30 | यदि \( { }^{2 n} C_{3}:{ }^{n} C_{2}=44: 3 \), तो \( { }^{n} C_{3} \) का मान ज्ञात कीजिए। |
| 2022-11-30 | एक A.P. में, यदि
\[
a_{1}+a_{5}+a_{10}+a_{15}+a_{20}+a_{24}=225 .
\]
तो इसके 24 पदों का योग ज्ञा... |
| 2022-11-30 | एक A.P. में, 5 वाँ और 8 वाँ पद क्रमशः 56 और 95 हैं। इसका 25 वाँ पद ज्ञात कीजिए। |
| 2022-11-30 | Assertion (A): \( \mathrm{C}_{4} \) pathway of \( \mathrm{CO}_{2} \) fixation is found in some t... |
| 2022-11-30 | निम्नलिखित A.P. के लिये प्रथम पद और सार्वान्तर लिखिए : \[ 2,5,8,11, \ldots \ldots \] |
| 2022-11-30 | नीचे दिये योग ज्ञात कीजिए : \[ 3+6+9+\ldots \ldots \ldots+96 \] |
| 2022-11-30 | The reactions of Calvin cycle not directly dependent on light, but they usually do not occur at ... |
| 2022-11-30 | श्रेणी \( -5-3-1+1+\ldots \) का \( n \) वाँ पद ज्ञात कीजिए। |
| 2022-11-30 | एक A.P. के प्रथम 8 पदों का योग 64 और प्रथम 15 पदों का योग 225 है। इसके प्रथम 17 पदों का योग ज्ञा... |
| 2022-11-30 | Cyclic and non-cyclic flow of \( e \) is used in plants to
(A) meet theATP demands of Calvin-cyc... |
0