What is the value of s4 for
a. 5 5/64
b. 5 1/4
c. 5 5/16
d. 5 5/6

 Option 'C' is correct.

Step-by-step explanation:

Since we have given that

We need to find the value of S₄.

So, it means sum of 4 terms.

Here it form a geometric series:

a = 4 = first term

r = = Common ratio

And sum of n terms whose ratio is less than 1 is given by

Hence, Option 'C' is correct.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

hi,

i'm 75% sure the answer is 1,1 to both lines.

have a great day