Use demos for graphing equations
the actual graph would be a V shape
Answer: 7 - - 12, -3 - 9, 15 - - 80
Step-by-step explanation:
Q24) It’s wrong because 7 - - 12 = 7 + 12 because two minus signs make a plus sign, 7 + 12 = 19
Q25) The answer is -3 - 9 because going deeper means negative
Q26) The answers would be 15 - - 80, this equals 90
1st,since this GP is convergent that means the common ratio r <1
2nd, sum of a GP = a₁(1-rⁿ)/(1-r), where a₁ = 1st term and n=number of terms
3rd, for any convergent GP, r<1 and the sum of all terms =a₁/(1-r): Why?
[since r<1 → lim rⁿ when n→∞, =0 in the formula of the 2nd)]
Now let's solve :
a) Sum = a₁(1-r³)/(1-r) = 19 (sum of the first 3 terms)
b) Σ(Sum) = a₁/(1-r) = 27 (sum of all terms of this CONVERGENT GP)
Divide a) by b):
[a₁(1-r³)/(1-r)] / [a₁/(1-r)] = 19 /27 ↔ [a₁(1-r³)/(1-r)] x [(1-r)/a₁]=19/27.
Simplify:
(1-r³) = 19/27
-r³ = 19/27 - 1
r³ = 8/27
r = ∛(8/27)
r = 2/3 and a₁ = 9 (Plug r in the Σ sum)
Hence first term a₁ = 9
and common ration r =2/3
The answer is -2,0 use pemdas
Answer:
-88
Step-by-step explanation:
If a=2, we can say that -
would be -4.
Secondly, if a=2 and b=-6 we can assume that 4ab would become -48.
Finally, if b=-6 we can say that -
would become -36.
Adding all of those up gives you -88, your answer.
