Question

c and d are two integers ,which of the following must be true, if (-3d) ÷ c is to be a Rational

Number.

1)d should be a positive number 2) d and c should be of opposite sign

3) d should be completely divisible by c 4) c should not be zero​

Answer 1

Given :  c and d are two integers ,

(-3d) ÷ c is to be a Rational

To Find : which of the following must be true

1)  d should be a positive number

2) d and c should be of opposite sign

3) d should be completely divisible by

4) c should not be zero​

Solution:

Rational numbers are real numbers which can be written in the form p/q where p and q are integers and q≠0

(-3d) ÷ c

Comparing with

p/q

p = - 3d   is an integer

q = c    is an integer but should not be equal to zero

Hence c ≠ 0

Correct option is

4) c should not be zero​

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Answer 2

Answer: C should not be zero

Step-by-step explanation: