ICSE Class X Math 2016 Solved Paper
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Question : 33
Total: 57
If
=
=
+
+
=
Solution:
Given:
=
=
= k
⇒ x = a k , y = b k , z = c k
L.H.S. =
+
+
=
+
+
= k 3 + k 3 + k 3 = 3 k 3
= 3 k ⋅ k ⋅ k
= 3
( ∵ x = a k , y = b k , z = c k )
=
= R.H.S.
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