गुणनफल ज्ञात कीजिए- (a+b)(a-b) | 7 | बीजगणित | MATHS | DAS GUPTA | Doubtnut

B.O. ज्ञात करने की ट्रिक |प्रश्न |Summary

If a : b = 2 : 3, then (5a + 3b) : (6a - 2b) is equal to : यदि a : b = 2 : 3 है, तो (5a + 3b) : (6a - 2b) का मान ज्ञात करें |

If a/b =7/3 , then find (a+b)/(a-b)

If a/b = 7/4 , then find ( b + a )/( b - a )

If a : b = 2 : 3, then (5a - 2b) : (5a + 2b) is equal to: यदि a : b = 2 : 3 है, तो (5a - 2b) : (5a + 2b) का मान ज्ञात करें |

If (a - b) = 4 and ab = 2, then (a^3-b^3) is equal to: यदि (a - b) = 4 और ab = 2 है, तो (a^3-b^3) का मान ज्ञात करें |

A ,B ,Ca n dD have position vectors vec a , vec b , vec ca n d vec d , respectively, such that vec a- vec b=2( vec d- vec c)dot Then a. A Ba n dC D bisect each other b. B Da n dA C bisect each other c. A Ba n dC D trisect each other d. B Da n dA C trisect each other

Let A B C D be a tetrahedron such that the edges A B ,A Ca n dA D are mutually perpendicular. Let the area of triangles A B C ,A C Da n dA D B be 3, 4 and 5sq. units, respectively. Then the area of triangle B C D is 5sqrt(2) b. 5 c. (sqrt(5))/2 d. 5/2