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If the lines (4x+7y=28) and (12x+my=84) are coincident, what is (m)?यदि (4x+7y=28) और (12x+my=84) की रेखाएं संपाती हैं, तो (m) क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (21)(21)
The second equation is (3) times the first, so (m=21). In a coincident line, the coefficient of (y) also changes in the same ratio.दूसरा समीकरण पहले का (3) गुना है, इसलिए (m=21)। संपाती रेखा में (y) का गुणांक भी उसी अनुपात में बदलता है।
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