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81. Rationalise the denominators of the following:

fraction numerator 1 over denominator square root of 7 minus square root of 6 end fraction

124 Views

82. Rationalise the denominators of the following:

fraction numerator 1 over denominator square root of 5 plus square root of 2 end fraction

119 Views

83. Rationalise the denominators of the following:

fraction numerator 1 over denominator square root of 7 minus 2 end fraction equals fraction numerator 1 over denominator square root of 7 minus 2 end fraction cross times fraction numerator square root of 7 plus 2 over denominator square root of 7 plus 2 end fraction

128 Views

84. Identify the following as rational or irrational numbers. Give the decimal representation of rational numbers.

square root of 4

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85. Identify the following as rational or irrational numbers. Give the decimal representation of rational numbers.

3 square root of 18

150 Views

86. Identify the following as rational or irrational numbers. Give the decimal representation of rational numbers.

square root of 1.44 end root

376 Views

87. Identify the following as rational or irrational numbers. Give the decimal representation of rational numbers.

square root of 9 over 27 end root

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negative square root of 06.4 end root space equals space minus space square root of 0.8 cross times 0.8 end root equals space minus 0.8 space equals space minus 8 over 10 equals negative 4 over 5

which is a rational number

Here p -4
q = 5

left parenthesis not equal to 0 right parenthesis

Its decimal representation is - 0.8

5 space right parenthesis space 4. space 0 space left parenthesis space 0. space 8 space space space space bottom enclose 4.0 end enclose space space space space space straight x

135 Views

89. Identify the following as rational or irrational numbers. Give the decimal representation of rational numbers.

square root of 100

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90. In the following equations, find which variables x, y, z etc., represent rational numbers and which represent irrational numbers:

x²= 5

972 Views