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$(1^{2}+ 2^{2} + 3^{2} + ... + 10^{2})$ = 385, the value of $(2^{2}+ 4^{2} + 6^{2} + ... + 20^{2})$ =

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$(1^{2}+ 2^{2} + 3^{2} + ... + 10^{2})$ = 385, the value of $(2^{2}+ 4^{2} + 6^{2} + ... + 20^{2})$ =
  • A770
  • B1540
  • C1155
  • D(385)2
Answer not set
0
CCommunity
right answer for this question is option 2
0
CCommunity
12 + 22 + 32 +......+ 102 = 385
22 + 42 + 62 + .... + 202
= 22 (12 + 23 + 32 + ..... + 102)
= 4 × 385 = 1540