Which of the following is closest in value to 9^9 – 9^2 ?
A. 9^9
B. 9^8
C. 9^7
D. 9^6
E. 9^5
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9^9-9^2
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just_do_it
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(9^7 -1) is closest to 9^7
therefore expression in paranthesis ~ 9^7
9^7 * 9^2 = 9^9
hope this helps.
therefore expression in paranthesis ~ 9^7
9^7 * 9^2 = 9^9
hope this helps.
I also did the same way as suggested by other members.
Another way to look at it is,
9^9 would result in such a huge number that 9^2, i.e. 81 would be insignificant. Hence, answer would be 9^9.
As I said, this struck me after I had solved. :roll:
Another way to look at it is,
9^9 would result in such a huge number that 9^2, i.e. 81 would be insignificant. Hence, answer would be 9^9.
As I said, this struck me after I had solved. :roll:
