(666 ... 6)² + (888 ... 8) is equal to ????-???????????????????????? ????-???????????????????????? (a) 4/9 (10ⁿ -1) (b) 4/9 (10²ⁿ - 1) (c) 4/9 (10ⁿ - 1)² (d) none of these
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too oops many questions marks is your question correct ??
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