book
Maths Puzzle
Numerical Ability
I know it's simple, but I can not understand how to use internal notation and graphing, to answer:
X-X^2 <= 0
Thank you!
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book Other Question
Suppoes the sum of the 151st and the 251st are of an arithmetic seuqence is 10. Find the sum of the first 401 terms in the sequence. Provide 3 examples.
7y+15=3x
15=3x+2y
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25x=91-16y
16y=64-16x
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4x-2y=-2
4x+3y=-12
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2x+y=-7
y=3x+3
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3x=-2y+10
x=2y=6
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