Ex 3.1
Ex 3.1, 1 (ii)
Ex 3.1, 2 (i)
Ex 3.1, 2 (ii)
Ex 3.1, 2 (iii)
Ex 3.1, 3 (i) Important
Ex 3.1, 3 (ii) Important
Ex 3.1, 3 (iii)
Ex 3.1, 3 (iv) Important
Ex 3.1, 3 (v) You are here
Ex 3.1, 4 (i)
Ex 3.1, 4 (ii)
Ex 3.1, 4 (iii) Important
Ex 3.1, 4 (iv)
Ex 3.1, 5
Ex 3.1, 6 Important
Ex 3.1, 7 Important
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Ex 3.1, 3 On comparing the ratios 𝑎1/𝑎2 , 𝑏1/𝑏2 & 𝑐1/𝑐2 , find out whether the following pair of linear equations are consistent, or inconsistent. (v) 4/3 x + 2y = 8 ; 2x + 3y = 12 4/3 x + 2y – 8 = 0 2x + 3y – 12 = 0 𝟒/𝟑 x + 2y – 8 = 0 Comparing with a1x + b1y + c1 = 0 ∴ a1 = 4/3 , b1 = 2 , c1 = –8 2x + 3y – 12 = 0 Comparing with a2x + b2y + c2 = 0 ∴ a2 = 2, b2 = 3, c2 = −12 ∴ a1 = 4/3 , b1 = 2 , c1 = – 8 & a2 = 2, b2 = 3 c2 = −12 𝒂𝟏/𝒂𝟐 𝑎1/𝑎2 = (4/3)/2 𝑎1/𝑎2 = 4/(3 × 2) 𝑎1/𝑎2 = 2/3 𝒃𝟏/𝒃𝟐 𝑏1/𝑏2 = 2/3 𝒄𝟏/𝒄𝟐 𝑐1/𝑐2 = (−8)/(−12) 𝑐1/𝑐2 = 2/3 Since 𝑎1/𝑎2 = 𝑏1/𝑏2 = 𝑐1/𝑐2 We have infinitely many solutions Therefore, our system is consistent.
