Answer:
1. a cannot equal 8 and 9.
2. B cannot equal 14 and 15.
3. No, because it is equal to 5, and the inequality says that it is strictly less than 5.
4. Yes. 8 times 3 is 24, which is less than 32.
Step-by-step explanation:
You basically plug the numbers in, and see if they could be true.
In the question you provided above what do you mean can you please give more details.
Your answer would be B, X+2 Y-1
(1+x^2)^8
=(1+8x^2+8*7/(1*2)x^4+8*7*6/(1*2*3)x^6+8*7*6*5/(1*2*3*4)x^8+....)
=1+8x^2+28x^4+56x^6+70x^8+....)
For x<1, higher power terms diminish in value, hence we can approximate powers of numbers.
1.01=(1+0.1^2) => x=0.1 in the above expansion
(1.01)^8
=1+8(0.1^2)+28(0.1^4)+56(0.1^6) [ limited to four terms, as requested]
=1+0.08+0.0028+0.000056 (+0.00000070)
=1.082856 (approximately)
