Q. 13.9( 17 Votes )
Find the value of each of the following using the short-cut method:
Let’s take, a = 2 and b = 5
So, by using the formula,
We have a3+3a2b+3ab2+b3
Keep the digits
By taking the highlighted digits only,
؞ (25)3 = 15625
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By taking three different, values of n verify the truth of the following statements:
(i) If n is even, then n3 is also even.
(ii) If n is odd, then n3 is also odd.
(ii) If n leaves remainder 1 when divided by 3, then n3 also leaves 1 as remainder when divided by 3.
(iv) If a natural number n is of the form 3p+2 then n3 also a number of the same type.RD Sharma - Mathematics
Which of the following numbers are not perfect cubes?
(iv) 1728RD Sharma - Mathematics
Find the cubes of the following numbers by column method:
(iii) 72RD Sharma - Mathematics