50 points to solve this
Find the value of the following by successive subtraction. [Using n^3 - (n- 1)^3 = 1 + 3n(n-1)]
a. (10) - (9)
c. (21) - (20)
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Answer:
ANSWER OF A IS
=(10)3- (9)3
=1000-729
=271
ANSWER OF B IS
=(21)3 - (20)3
=9261 - 8000
=1261
Step-by-step explanation:
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