Practice Questions
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Q84.The remainder when 19200 + 23200 is divided by 49, is _____ .
Q84.If the four points, whose position vectors are 3Λi β4Λj + 2Λk,Λi + 2Λj βΛk, β2Λi βΛj + 3Λk and 5Λi β2Ξ±Λj + 4Λk are coplanar, then Ξ± is equal to (1) 7317 (2) β10717 (3) β7317 (4) 10717 β β β
Q84.The 4th term of GP is 500 and its common ratio is πβπ. Let ππ denote the sum of the first π terms of π, π is ______ this GP. If π6 > π5 + 1 and π7 < π6 + 12, then the number of possible values of
Q84.Let y = f(x) be the solution of the differential equation y(x + 1)dx βx2dy = 0, y(1) = e. Then lim xβ0+ f(x) is equal to (1) 0 (2) 1e (3) e2 (4) 1 e2 β
Q84.Let y = y(x) be the solution of the differential equation dxdy + x(x5+1)5 y(2) is equal to (1) 637 (2) 679 128 128 (3) 693 (4) 697 128 128 is equal to
Q84.Let y = y(x) be the solution of the differential equation x loge x dxdy + y = x2 loge x, (x 1). If then y(e) is equal to (1) 4+e2 (2) 1+e2 4 4 (3) 2+e2 (4) 1+e2 2 2
Q84.Let a, b, c be three distinct real numbers, none equal to one. If the vectors aΛi + Λj + Λk, Λi + bΛj + Λk and Λi + Λj + cΛk are coplanar, then 1βa1 + 1βb1 + 1βc1 is equal to (1) 2 (2) β1 (3) β2 (4) 1 β
Q84.Let y = y(x) be the solution of the differential equation (3y2 β5x2)ydx + 2x(x2 βy2)dy = 0 such that y(1) = 1. Then (y(2))3 β12y(2) is equal to : (1) 64 (2) 32β2 (3) 32 (4) 16β2 β
Q84.The solution of the differential equation dxdy = β( x2+3y23x2+y2 ), (1) loge|x + y| β xy = 0 (2) loge|x + y| + xy = 0 (x+y)2 (x+y)2 (3) loge|x + y| + (x+y)2 2xy = 0 (4) loge|x + y| β (x+y)22xy = 0 + Γ Γ Γ β = 8Λi β40Λj β24Λk then
Q84.Let πΌ> 0, be the smallest number such that the expansion of π₯ 3 + 2 has a term π½π₯-πΌ, π½βπ. Then πΌ is π₯3 equal to _____ .
Q85.Let Ξ± = 4Λi + 3Λj + 5Λk and Ξ² = Λi + 2Λj β4Λk. Let Ξ²1 be parallel to Ξ± and Ξ²2 be perpendicular to Ξ±. If β β β β + Ξ² = Ξ²1 + Ξ²2 , then the value of 5 Ξ²2 β (Λi +Λj Λk) is (1) 6 (2) 11 (3) 7 (4) 9 β β β β b + 43 = 0 , βaΓβc= b Γβc, then βaβ b is equal to
Q85.If the domain of the function ππ₯= sec-1 is [πΌ, π½) βͺ( πΎ, πΏ], then 3πΌ+ 10π½+ πΎ+ 21πΏ is equal to 5π₯+ 3 __________ is the largest, = 4AB. If the area of βCAB is 2β3 - 3 unit2, when ΞΈ2
Q85.Let βa = 5Λi βΛj β3Λk and b = Λi + 3Λj + 5Λk be two vectors. Then which one of the following statements is TRUE? β β (1) β13 (2) β17 Projection of βa on b is and the direction Projection of βa on b is and the direction of β35 β35 of the projection vector is opposite to the the projection vector is opposite to the direction β β direction of b of b β β (3) 17 (4) 13 Projection of βa on b is and the direction of Projection of βa on b is and the direction of β35 β35 the projection vector is opposite to the direction the projection vector is opposite to the direction β of b of βa β
Q85.Let Ξ» βZ, βa = Ξ»Λi + Λj βΛk and b = 3Λi βΛj + 2Λk. Let βc be a vector such that + b = 0, βaβ βc= β17 and b β βc= β20. Then βcΓ (Ξ»Λi + Λj + Λk) is equal to (βa β β β 2 +βc) Γβc (1) 46 (2) 53 (3) 62 (4) 49 JEE Main 2023 (12 Apr Shift 1) JEE Main Previous Year Paper
Q85.If the points with position vectors Ξ±Λi + 10Λj + 13Λk, 6Λi + 11Λj + 11Λk, 92Λi + Ξ²Λj β8Λk are collinear, then (19Ξ± β6Ξ²)2 is equal to (1) 36 (2) 25 (3) 49 (4) 16 β β
Q85.Let the vectors u1β = Λi + Λj + aΛk, u2β = Λi + bΛj + Λk, and u3β = cΛi + Λj + Λk be coplanar. If the vectors βββ β v1 = (a + b)Λi + cΛj + cΛk, v2 = aΛi + (b + c)Λj + aΛk and βv3 = bΛi + bΛj + (c + a)Λk are also coplanar, then 6(a + b + c) is equal to (1) 0 (2) 4 (3) 12 (4) 6
Q85.Let βa = Λi + 2Λj + 3Λk, b = Λi βΛj + 2Λk and βc= 5Λi β3Λj + 3Λk, be there(three) vector. If βris a vector such that, βrΓβb =βcΓβb and βrβ βa = 0, then 25βr 2 is equal to (1) 560 (2) 339 (3) 449 (4) 336 . If the angle Γ = 3(βcΓβa)
Q85.If ππ₯= π₯2 + π'1π₯+ π"2 and ππ₯= π1π₯2 + π₯π'π₯+ π"π₯, then the value of π4 - π4 is equal to _____ .
Q85.Let βa = Λi + 4Λj + 2Λk, b = 3Λi β2Λj + 7Λk and βc= 2Λi βΛj + 4Λk. If a vector d satisfies d Γ b =βcΓ b and d β βa = 24, β2 then d is equal to (1) 323 (2) 423 (3) 313 (4) 413 β β β 2
Q85.Let π΄= 1, 2, 3, 4, . . . . . . . . . . 10 and π΅= 0, 1, 2, 3, 4 . The number of elements in the relation π = (π, π) βπ΄Γ π΄: 2π- π2 + 3π- πβπ΅ is __________ .
Q85.The coefficient of π₯7 in 1 - π₯+ 2π₯310 is __________ .
Q85.If βa = Λi + 2Λk, βb= Λi + Λj + Λk, βc= 7Λi β3Λj + 4Λk, βrΓβb+βbΓβc=β0 and βrβ βa = 0 then βr.βcis equal to: (1) 34 (2) 12 (3) 36 (4) 30 + Λj + Γ = 4
Q85.Let Ξ» βR,βa = Ξ»Λi + 2Λj β3Λk,βb = Λi βΞ»Λj + 2Λk, If ((βa βb) (βa βb)) (βa βb) β β + Γ β 2 is equal to Ξ»(βa b) (βa b) (1) 140 (2) 132 (3) 144 (4) 136 β β b, then the value of Γ β3 b β βcis
Q85.If the vectors βa = Ξ»Λi + ΞΌΛj + 4Λk, b = β2Λi + 4Λj β2Λk and βc= 2Λi + 3Λj + Λk are coplanar and the projection of βa β on the vector b is β54 units, then the sum of all possible values of Ξ» + ΞΌ is equal to (1) 0 (2) 6 (3) 24 (4) 18 β
Q85.If four distinct points with position vectors βa,βb,βcand βd are coplanar, then [βaβbβc] + + + + (1) [βd βb βa] [βa βc βd ] [βdβb βc] (2) [βa βd βb] [βd βc βa] [βd βb βc] (3) [βd βc βa] + [βb βd βa] + [βc βd βb ] (4) [βb βc βd ] + [βd βa βc] + [βd βb βa] β β β = 27 and b β βc=