-56=56
True, because Rational Numbers have an absolute value. Or
We know modulus of any number is positive i.e., ±a=+a
⇒-56=+56=56
Hence, this is true -56=56.
Question 6
Which of the following expressions show that rational numbers are associative under multiplication. (a) 23×(−67×35)=(23×−67)×35 (b) 23×(−67×35)=23×(35×−67) (c) 23×(−67×35)=(35×23)×−67 (d) (23×−67)×35=(−67×23)×35
Evaluate:
(i)(53)2×(53)2
(ii)(56)6×(56)−4
(iii)(23)−3×(23)−2
(iv)(98)−3×(98)2
Verify the following :
(i) 37×(56+1213)=(37×56)+(37×1213) (ii) −154×(37+−125)=(−154×37)+(−154×−125) (iii) (−83+−1312)×56=(−83×56)+(−1312×56) (iv) −167×(−89+−76)=(−167×−89)+(−167×−76)
The value of (506)−(51)(406)+(52)(306)−(53)(206)+(54)(106) where (nr) denotes nCr is