CBSE Class 10 Answered
Show that
Asked by priyankas | 15 Oct, 2008, 10:01: PM
Expert Answer
Let n be a positive integer.
Then n = 3p or 3p + 1 or 3p+ 2
Case I : If n = 3p , then n3 = 27 p 3 = 9m
Case II If n = 3p+1 , then n3 = (2p+1)3 = 27 p3 + 9p ( 3p+1) + 1
= 9m +1
Case II If n = 3p +2 , the n3 = ( 3p+2) 3 = 27 p3 + 18 p ( (3p + 2 ) + 8 = 9m + 8
Therefore , from Case I , II and II , n cube of any positive integer is of the form 9m, 9m+1 or 9m+8.
Answered by | 16 Oct, 2008, 08:03: PM
CBSE 10 - Maths
Asked by KONDA VENKATA KHEERTHANA | 04 May, 2018, 10:29: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Show that every positive even integer is of the form2q and every positive odd integer is of the form
Asked by suryap2 | 26 May, 2010, 04:16: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by surazz | 23 May, 2010, 12:31: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by sahil.95rana | 23 May, 2010, 06:53: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by surazz | 09 May, 2010, 10:06: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by sumandeesinghrana | 30 Apr, 2010, 08:15: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by ayushikas | 30 Apr, 2010, 08:42: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by saraza | 27 Apr, 2010, 08:55: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by kanz_daruler1 | 26 Apr, 2010, 09:52: PM
ANSWERED BY EXPERT
