Question

va rogggg am nevoie de ajutor!!!

Answer 1

Răspuns:

Explicație pas cu pas:

2. a2=a1+r = 15-2 =13  

r = -2

a5 = 15 +4(-2) =15 - 8 = 7

3. r = b2/b1 = 3/6 = 1/2

b5 = 6*(1/2)^4 = 6/16 = 3/8

b9 = 6*(1/2)^8 = 6/2^8 = 6/256 = 3/128

b5/b9 = 3/8 * 128/3 = 128/8 = 16

4. f(0) = 4*0 + 1 = 1

f(1) = 4*1 + 1 = 5

f(2) = 4*2 + 1 = 9

...

f(8) = 4*8 + 1 = 33

r = 4

S = 9*(1 + 33)/2 = 9*17 = 153