x²/11 + y²/16 = 1
2.) { x-y+1≥0 { 5-2x-y≥0 - ANSWER-All real x values, y≥7/3
3.) Obtain the 30th term of an arithmetic sequence whose 5th term is -3 and 14th term is 24.
a = a+14d=-3₅
a = a+13d=24 - ANSWER-a =72₁₄ ₃₀
4.) -15,-10,-5, 0, ... (through 12th term) - ANSWER-s =150 ₁₂
5.) ∑(3k-2) - ANSWER-10+12 = 22
6.) Obtain the 1st term and common ratio of a geometric sequence whose 5th term is 24
and 7th term is 96. - ANSWER-a =24 ₅
a =96₇
r=±2
1st term = 3/2
7.) {s = a(r¹ -1)/r-1 = 4 ₁₀ ⁰