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RD Chapter 2 Exponents of Real Numbers Ex 2.2 Solutions

Question - 11 : - If x = 21/3 + 22/3, show that x3 – 6x = 6.

Answer - 11 : -


Question - 12 : - Determine (8x)x, if 9x+ 2 = 240 + 9x.

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Question - 13 : - If 3x+1 = 9x-2, find the value of 21 +x.

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Question - 14 : - If 34x = (81)-1 and 101/y = 0.0001, find the value of 2-x+4y

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Question - 15 : - If 53x = 125 and 10y = 0.001 find x and y.

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Question - 16 : - Solve the following equations:

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Question - 17 : -

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Question - 18 : - If a and b are different positive primes such that

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Question - 19 : - If 2x x 3y x 5z = 2160,find x, y and z. Hence, compute the value of 3x x 2-y x5-z.

Answer - 19 : -


Question - 20 : - If 1176 = 2a x 3b x 7c, findthe values of a, b and c. Hence, compute the value of 2a x 3b x7-c as a fraction.

Answer - 20 : -


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