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yanalaym [24]
3 years ago
14

Find a fraction that is equivalent to 1.5 over 9 with a whole number in both numerator and the denominator

Mathematics
1 answer:
Aneli [31]3 years ago
8 0

Answer: \frac{1}{6}

Step-by-step explanation:

We need to remember that equivalent fractions are  defined as fractions whose numerators and denominator are different but both fractions represent the same value.

To find an equivalent fraction, we must multiply the numerator and the denominator by the same number (Which must be a nonzero whole number).

In this case, to find a fraction equivalent to \frac{1.5}{9},  with a whole number in both numerator and the denominator, we can multiply the numerator and the denominator by 2. Then you get:

\frac{1.5*2}{9*2}=\frac{3}{18}

Reducing the fraction, you get:

=\frac{1}{6}

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The integral is equal to 5\sec^2(2x)+C for an arbitrary constant C.

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c) We use the trigonometric identity \tan(2x)^2+1=\sec(2x)^2 is part b). The value of the integral is 5\sec^2(2x)+C=5(\tan^2(2x)+1)+C=5\tan^2(2x)+5+C=5\tan^2(2x)+C. which coincides with part a)

Note that we just replaced 5+C by C. This is because we are asked for an indefinite integral. Each value of C defines a unique antiderivative, but we are not interested in specific values of C as this integral is the family of all antiderivatives. Part a) and b) don't coincide for specific values of C (they would if we were working with a definite integral), but they do represent the same family of functions.  

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