Question
Download Solution PDFदोन संख्यांची बेरीज 17 आहे तर त्यांच्या वर्गांची बेरीज 157 आहे. त्या दोन संख्यांच्या घनांची बेरीज शोधा.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेले आहे:
दोन संख्यांची बेरीज 17 आहे
त्यांच्या वर्गांची बेरीज 157 आहे
वापरलेली संकल्पना:
x3 + y3 = (x + y)(x2 + y2 - xy)
(x + y)2 = x2 + y2 + 2xy
गणना:
समजा दोन संख्या x आणि y आहे
म्हणून,
(x + y) = 17 आणि (x2 + y2) = 157
आता,
(x + y)2 = 289
⇒ x2 + y2 + 2xy = 289
⇒ 157 + 2xy = 289
⇒ 2xy = 289 - 157
⇒ 2xy = 132
⇒ xy = 66
आता,
x3 + y3 = (x + y)(x2 + y2 - xy)
⇒ x3 + y3 = 17(157 - 66)
⇒ x3 + y3 = 17 × 91
⇒ x3 + y3 = 1547
∴ त्या दोन संख्यांच्या घनांची बेरीज 1547 आहे.
Last updated on Jul 5, 2025
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