Math equations

Question 1

Quadratic formula

Answer 1

x=-b+-√b^2-4ac/2a

Quadratic equation: ax^2 + bx + c = 0

Refer to video if still need help: http://youtu.be/qeByhTF8WEw?si=TpYH63BZA8u4b9xY&t=482

Question 2

Arithmetic Sequence formula

Answer 2

an=a1+(n−1)d.

a_n = the nᵗʰ term in the sequence
a_1 = the first term in the sequence
d = the common difference between terms (the number it’s being minus/added with)

Question 3

Geometric Sequence formula

Answer 3

an=a1(r)^n-1

a_n = the nᵗʰ term in the sequence
a_1 = the first term in the sequence
r = common ratio (the number it’s being mutiplied/divided with)

Question 4

Arithmetic Sum formula

Answer 4

Sn=(a1+an / 2) n

an = the an here is referring to the last number in this sequence

Question 5

Arithmetic Sum formula

Answer 5

Sn=[a1(1-rn)] / 1-r

r = common ratio (the number it’s being mutiplied/divided with)