co-ordinate geometry-2

BITSAT 2015 Papers › Co-ordinate Geometry questions › co-ordinate geometry-2

The straight line whose equation is ax+by=1 where ab>0passes through (3,4) and makes a triangle of area S with the co-ordinate axis. then the least value of S is
a)12
b)24
c)6
d)7

#Mathematics #Co-ordinate Geometry

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Mani Pal Singh ·2009-03-23 23:18:21

HEY
I AM TRYING SOMETHING NEW AND CREATIVE SO PLEASE BEAR IT AND DO INFORM AM I CORRECT OR NOT!!!!!!!!!

NOW I AM ASSERTING THAT THE AREA WILL BE MINIMUM IF BOTH THE LINES ARE PARALLEL

i.e SLOPE OF ax+by=1 SHOULD BE tan^-14/3
SO
THIS IS MINIMUM WHEN a/b=4/3 AND IT SHOULD BE PROPORTIONAL SO a=8 AND b=6

and the area =1/2ab
=1/2X8X6=24

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Mani Pal Singh ·2009-03-27 23:22:07

ooooo TOPPER (AIR 1 )
WATS THE ANSWER TO THIS ONE

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Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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co-ordinate geometry-2

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