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# CBSE Class 10 Answered

Please answer the following question.
Asked by | 05 Jun, 2008, 11:40: AM
Expert Answer

x and y are positive integers.

thus, y = 2m for some positive integer m

(x+y) is odd number

so, x+y = 2n +1 for some n in N.

x+3y = x+y+2y

= 2n+1+2m

= 2(n+m)+1

n and m are positive integers, hence n+m is also a positive integer say k

n+m=k

x+3y = 2k+1

hence, x+3y is odd number.

Answered by | 16 Jul, 2008, 04:49: PM
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