Question

please give me the answer as soon as possible​

Answer 1

Given :-

• If a ≡ b (mod n) and c > 0 then ca ≡ ?(mod n)

Solution :-

• We know that, when one number is congruent to another number, if we multiply both the numbers by the same positive integer, the congruency will not change.
• Likewise, here a ≡ b (mod n) and a is multiplied by c. So, if b is also multiplied by c, then the congruency will remain.

∴ ca ≡ cb (mod n)

⇒ Out of the given options, option (d) is correct

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→Sathvik :)