Saved Bookmarks
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
How many terms of the AP -5,-9/2, -4, .... will give the sum 0? |
|
Answer» -19=n It is much better to use doubtnut app for clearing the doubts by video solution in hindi language a is -5 ,d is 1/2 ,an is 0Here we have to find nApply the formula :an=a+(n-1)dAnd you will get your answer |
|
| 152. |
let A = (1,2,3), B=(3,4) and c={4,5,6} find A×(B U C) |
|
Answer» (1,3)(1,4)(1,5)(1,6)(2,3)(2,4)(2,5)(2,6)(3,3)(3,4)(3,5)(3,6) {(1,3),(1,4),(1,5),(1,6),(2,3),(2,4)(2,5),(2,6),(3,3),(3,4),(3,5),(3,6)} |
|
| 153. |
A={3,4} B={x belong to N ,2x -1smaller than 5} modules A×B modules colse |
| Answer» (1,3),(1,4),(2,3),(2,4) | |
| 154. |
Convert the following binary numbers to the decimal (i) - 1110101100 |
| Answer» | |
| 155. |
cos^2a+cos^2(a+120)+cos^2(a-120) |
| Answer» | |
| 156. |
I can\'t understand limits |
|
Answer» Actually u have studied the same in 10th so be cool and study camly Don\'t go too much deep in the concept. Just proceed step by step. Vaise bhi Newton ki batao chizon ko kon samajh paya h Start meditation and yoga and control yourself . One day u will understand your limits ???? |
|
| 157. |
write the interval {-2< x ≤ -1} |
| Answer» (-2,-1] | |
| 158. |
n^2+n find the sum of n terms in this series |
| Answer» | |
| 159. |
(ax)power n+b power n |
| Answer» | |
| 160. |
What is the numarutue |
| Answer» | |
| 161. |
Question(1 Point)???−>32\xa0(?+[?])\xa0??\xa0?????\xa0??Ltx−>32\xa0(x+[x])\xa0is\xa0equal\xa0to5252 |
| Answer» | |
| 162. |
Question(1 Point)???−>3\xa0|?|?\xa0??Ltx−>3\xa0|x|x\xa0is11 |
| Answer» | |
| 163. |
What is A union B intersection A union A\' |
|
Answer» AUB Answer is AUB |
|
| 164. |
1-2i/2+i+4-i/3+2i |
|
Answer» (10-24i)/13 (10-24i)/13 |
|
| 165. |
Far What Value of k are the poin ریم (2,4), (1,-3) and (3, 6) Collineas |
| Answer» | |
| 166. |
Vartika |
| Answer» Vartika jha has been one of the contestant of dance plus and now she is a choreographer in super dancer chapter 4 | |
| 167. |
9(15*+30/45) |
| Answer» 9 | |
| 168. |
Domain of x2-1 / x2+4x-21 |
| Answer» | |
| 169. |
√3x2-√2x+3√3=0 |
| Answer» x=5√6by 2 | |
| 170. |
What is centromer e |
| Answer» It is the part of chromosome | |
| 171. |
Lim. 4x-1/2√x-1X 1/4. |
| Answer» | |
| 172. |
Find the conjugate of the complex numbers:(i) -i√5 |
|
Answer» change this symbol iyota sign change iorta Conjugate of the given complex number is +i√5 |
|
| 173. |
Find the modulus and the arguments of each complex numbers:1) z=-1-i√3 |
| Answer» Argument of z=πby3 and modulus of z=2 | |
| 174. |
If ????+????÷????−???? = 3,?ℎ?? the value of ??? 4 ? ?? a) 16 / 25 b) 2/5 c) 1/5 d) 3/5 |
| Answer» Correction : find the value of sin^4 theta | |
| 175. |
Definition of set |
|
Answer» A set is a well defined or well distinguished collection of objects . A set is well-defined collection of objectsEx- ( a,e,i,o,u) A set is a well defined or well distinguished collection of objects . In Math, sets are a collection or aggregate of well define objects or elements. |
|
| 176. |
The sum of ap 2,5,8......up to 50 |
| Answer» We use the arithmetic prgression A=2 D=5-2=3 N=50 Sn=n/2[2a+(n-1) d]S50= 50/2[2*2+(50-1)3]S50=25[4+49*3] S 50= 25*4+147S50=25*149S50= 3725 answer | |
| 177. |
If f(x)=2x+5 compute f(2)-f(1/2). |
| Answer» f(2) = (2*2) + 5f(2) = 4+5f(2) = 9f(1/2) = (2*(1/2)) + 5f(1/2) = 1+5f(1/2) = 6f(2)-f(1/2) = 9-6f(2)-f(1/2) = 3 | |
| 178. |
cot 2x cotx -cot 3x cot 2x- cot3x cot2x |
| Answer» | |
| 179. |
Calculate the value of a and b when |
| Answer» 3,b | |
| 180. |
What is the value of tan45°. |
|
Answer» 1 1 1 1 1 |
|
| 181. |
Evaluate if limit tends to 0 (1+")^n-1/ x |
| Answer» | |
| 182. |
What is the meaning of set B^c? |
| Answer» Bc | |
| 183. |
what is the value of 1^2+2^2+3^2 __ 8^2 |
|
Answer» 204 By using the formula : n(n+1)(2n+1)/6 Above formula is derived for finding the sum of the squares of \'nth’ natural numbers. 204By using the formula :n(n+1)(2n+1)/6Above formula is derived for finding the sum of the squares of \'nth’ natural numbers. |
|
| 184. |
I+1/cos π/4+isin π/4 |
| Answer» Write cosπ = cos 2(π/2) Then, put the identity of cos 2x=1-2 sin^2 x,Which mean, cos 2(π/2)= 1-2sin^2 π/2 | |
| 185. |
Chap 5 |
| Answer» Complex number and quadratic equations | |
| 186. |
F(x)= /x-1/ |
| Answer» | |
| 187. |
Covert central angle of a circle of radius 120cm subtended by an arc of length 44cm into degree |
| Answer» ∅=l/r, ∅=44/120 = 11/30 radian. (11/30×180/π)° take value of π=22/7, answer is 21° | |
| 188. |
At what time between 9 and 10 o\'clock are the hand of a clock 23 minutes space apart |
| Answer» | |
| 189. |
At what time between 9 and 10 o\'clock are the hands of clock 23 minute space apart |
| Answer» | |
| 190. |
How do i get Assertion Reson Questions |
| Answer» | |
| 191. |
sin6a ka sutra |
| Answer» | |
| 192. |
please someone help with the solution of class math cbse lab activity no.12 |
| Answer» | |
| 193. |
X squared equals to 25 |
|
Answer» given x^2=25then, x=root 25root25=5x=5 Ans. 5 Then x=5 |
|
| 194. |
√x²-5 Find domain&range.. |
| Answer» | |
| 195. |
Pdf on sets lesson |
| Answer» Problm 1 | |
| 196. |
Construct a straight line segment of length root 21 cm |
| Answer» | |
| 197. |
The domain and range of the real function f defined by f(x)=(4-x)/(x-4) is |
| Answer» | |
| 198. |
How to do sets |
| Answer» | |
| 199. |
Sumition 13(in+in+1)=(-1+i),nbelongs to N |
|
Answer» 26in + 2 =i i= - 14/25 |
|
| 200. |
2x+3=0 |
|
Answer» x=-3/2 X=-3/2 X=-3/2 X = -3/2 A={1,2,3,4,5,6,.....}and B={2,4,6 ,...}find AΠB? |
|