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CBSE Class 7 Answered

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Asked by ushmaush | 14 Jan, 2023, 12:20: PM
answered-by-expert Expert Answer
Q: BY what number should (-12)-1 be divided so that the quotient may be (2/3)-1 ?
Solution:
Let (-12)-1 be divided by x to get the required quotient
rightwards double arrow left parenthesis negative 12 right parenthesis to the power of negative 1 end exponent over straight x equals open parentheses negative 2 over 3 close parentheses to the power of negative 1 end exponent rightwards double arrow left parenthesis negative 12 right parenthesis to the power of negative 1 end exponent over straight x equals negative 3 over 2 rightwards double arrow straight x equals fraction numerator left parenthesis negative 12 right parenthesis to the power of negative 1 end exponent over denominator negative begin display style 3 over 2 end style end fraction rightwards double arrow straight x equals negative 2 over 3 cross times open parentheses negative 12 close parentheses to the power of negative 1 end exponent rightwards double arrow straight x equals negative 2 over 3 cross times fraction numerator 1 over denominator negative 12 end fraction rightwards double arrow straight x equals 1 over 18 Hence comma space the space number space must space be space divide space by space 1 over 18.
Answered by Renu Varma | 16 Jan, 2023, 11:50: AM

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CBSE 7 - Maths
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Asked by ushmaush | 14 Jan, 2023, 12:20: PM
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CBSE 7 - Maths
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how to do this 👇🏻
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Asked by palakjain141780 | 28 Jan, 2021, 06:38: AM
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CBSE 7 - Maths
Simplify each of the following and express the answer in the exponential form :  Question1.(125)4power\ (5)7power? Question2.(2)3power*(2)7power*(4)2power? Question3.(x)4power * (y)4power? Question4.(9)xpower \ (3)3power? Question5.(4)7power *(3)0power \(4)3power * (4)4power ? Question6.(5)6power*(a)7power\(5)2power*(a)3power*(10)0power? Question7.((3)2power * (9)4power)? Question8. (-5)7power \ (-5)3power? Question9.((15)3power)5power? Question10.(-2\3)8power *(6\5)8power? Question11.(-9\7)16power*(-9\7)0power? Question12.(-13\19)21power \ (-13\19)16power ?
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CBSE 7 - Maths
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