Calculus- need with this problem. above the sigma is an infinity sign and below it says n=1 the equation is 6*(-1/4)^n-1

B

Step-by-step explanation:

S = An/1 - r

A1 = 6

6/1 - (-1/4)

6/1 + (1/4)

6/1.25

S = 4.8 or 24/5

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !