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Prove that a/b=c/d⇔ad=bc (Principle for equality of fraction)

Please Describe the role of Supreme Court in Pakistan Politics today..
Please explain with minimum 2 to 3 Paragraph..

Q: For real numbers a,b show the following by stating the properties used:

I) (-a)b = a(-b) = -ab

ii) (-a)(-b) = ab

Q: Prove that for any Real Numbers a,b ab=0⇒a=0 or b=0

Q: Which of the following sets have
Closure property w.r.t addition and
Multiplication?

I ) {0} ii) {1}

iii) {0,-1} iv) {1,-1}

I need a marketing letter that targets the following:

1. Married No Kids
2. 50k to 70k

Pdf Software and Programming language..

Q: Please tell me In Which Programming Language, Pdf Software Like Adobe Pdf Reader, Foxit Pdf Reader and Nitro Pdf Software Created..