7. यदि 5 = 2.236 है, तो /180 - 180 का मान क्या होगा?
(a) 47.44
(b) 7.44
(c) 5
(d) 4.4720
Answers
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Step-by-step explanation:
सही विकल्प: D
यदि √5 = 2.236 हो ,
तो √180 - √80 = √( 2 × 2 × 3 × 3 × 5 ) - √( 2 × 2 × 2 × 2 × 5 )
= 6√5 - 4 √5 = 2 √5
= 2 × 2.236 = 4.4720 ( ∴ √5 = 2.236 )
∴ √180 - √80 = 4.4720
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