Question
Download Solution PDFखालीलपैकी कोणते विधान योग्य आहे?
I. जर
II.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेले:
k + 1/k = 12
उपयोजित सूत्र:
(x + 1/x)2 = (x2 + 1/x2) + 2
(a - b)(a + b) = a2 - b2
गणना:
पहिले विधान विचारात घेऊ,
k + 1/k = 12
चा वापर करून,
(x + 1/x)2 = (x2 + 1/x2) + 2
(k2 + 1/k2) = 144 - 2
(k2 + 1/k2) = =142
म्हणून, पहिले विधान योग्य आहे.
आता दुसरे विधान विचारात घेऊ,
(a - b)(a + b) = a2 - b2 चा वापर करु,
म्हणून, दुसरे विधान अयोग्य आहे.
म्हणून, फक्त विधान I योग्य आहे.
∴ पर्याय 1 हे योग्य उत्तर आहे.
Mistake Points
कृपया नोंद घ्या,
(K4)2 = K4 * 2 = K8
म्हणून, विधान 2 योग्य नाहे.
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