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Please answer this questionThe product of 13 integer numbers is positive. From this intormation we can
deduce that it is necessarily true that: a)If (a) all factors are positive. b) one factor is positive and 12 factors are negative. (с) 7 factors are positive and 6 factors are negative. (d) there is an odd number of positive factors (in the product), (е) at least two factors are negative. Which answer is correct and why ?
английский язык обучение
KHUJAAZIZKHON NEMATILLOKHONOV
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It ought to be clear that if a product of n integer numbers is positive then we can deduce:
1) there is an even number of negative factous in the product; 2) among the factors there is no zero. Thus (d) is the correct answer (indeed [m]13-2n[/m] is an odd number). |
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Видо временная форма, проверьте меня)
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Надо найти глагол-сказуемое и определить его видовременную форму и залог
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