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CBSE Class 8 Answered

Evaluate:
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

According to a property, for every natural number n,

(n + 1)2 - n2 = (n + 1) + n = 2n + 1

Therefore,

752 - 742 = 2 x 74 + 1 = 148 + 1 = 149

Answered by | 04 Jun, 2014, 03:23: PM

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