Question
Download Solution PDFযদি 14x + 8y + 5 = 0 এবং 21x - ky - 7 = 0 এই দুটি সমীকরণের কোনও সমাধান না হয় তবে k এর মান কত হবে?
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⇒ সমীকরণের ঢাল সমান হলে তাদের কোনও সমাধান থাকে না
⇒ 1ম সমীকরণের ঢাল = - 14/8 = - 7/4
⇒ 2য় সমীকরণের ঢাল = 21/k
⇒ ফলে, 21/k = - 7/4
∴ k এর মান হল - 12
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