Q9: Geometric Sequence

Find the sum of the first 10 terms of the following series, to the nearest integer.

6, 12, 24...

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

Q10: Arithmetic Sequence.

Find the sum of the first 43 terms of the following series, to the nearest integer. 4, 12 ,20,...

Q11: Basic Trigonometric concept:

a) Convert 150 to radian

b) Convert 2 radian to degree. 5

Sn = n(a1 + an )/ 2 Explicit formula an = a1 + (n-1)d