1.

If 12 + 22 + 32 + ........ + 5122 = m, then 22 + 42 + 62 + ........ + 10242 is equal to (a) 3m (b) 4m (c) m2 (d) m3

Answer»

(b) 4m

22 + 42 + 62 +........ + (1024)2 

= 22 (12 + 22 + 32 + ........ + 5122 ) = 4m.



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