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E AND POWERS Exponents and Powers 12
Let us solve some examples using the above Laws of Exponents. m 1 m a a − = for any non-zero integer a. In Class VII, you have learnt that for any non-zero integer a, m m n n a a a = −, where m and n are natural numbers and > . These laws you have studied in Class VII for positive exponents only. –5 is the sum of two exponents – 3 and – 2
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www.ncert.nic.in317 Alcohols, Phenols and Ethers Allylic and benzylic alcohols may be primary, secondary or tertiary. (ii) Compounds containing C OHsp2 − bond: These alcohols contain —OH group bonded to a carbon-carbon double bond i.e., to a
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www.ncert.nic.in2-5 Kku ,oa le> 28 2-5-1 cqfu;knh {kerk,¡ 29 2-5-2 O;ogkj esa Kku 30 2-5-3 le> ds :i 31 2-6 Kku dks fQj ls jpuk 33 2-7 cPpksa dk Kku vkSj LFkkuh; Kku 34
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