sum_(n=-1)^infinity(-1)^(n+1) (1/3)^n = 9/4~~2.25... How

Find a formula forSum_{j=1}^n (j+3) (j-4) So far, I have foiled to j^2-j-12. Thus,Sum_{j=1}^n(j^2) - Sum_{j=1}^n(j) -
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sum_(n=-1)^infinity(-1)^(n+1) (1/3)^n = 9/4~~2.25...How do you find that out? Is there a formula?
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Find the horizontal asymptote off(x)=e^x - x lim x->infinity (e^x)-x= infinity when it's going towards infinity, shouldn't it
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Consider the function f(x)=-((x^2)/2)-9.In this problem you will calculate integrate from 0 to 3 of ((-x^2)/2)-9)dx by using the
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what are the sums? \sum_(k=0)^5 50((1)/(8))^(k) \sum_(k=0)^6 27((1)/(3))^(k) \sum_(k=0)^6 33((1)/(2))^(k)
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What is the domain of f/g, given f(x)= x+2 and g(x)= x-7?I was told this below, all real numbers EXCEPT 7 But My choices are
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2. asked by Kate
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Let $|r| < 1$,$$S = \sum_{k=0}^{\infty} r^k,$$ and $$T = \sum_{k=0}^{\infty} k r^k.$$ Our approach is to write $T$ as a
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Determine convergence or divergence for the following series. State the tests used and justify your answers.Sum (infinity, n=1)
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1. If -1/infinity = infinity or -infinity ?2. If lim x->infinity^- = infinity & lim x->inifinity^+ = -infinity, then lim
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1. If -1/infinity = infinity or -infinity ?2. If lim x->infinity^- = infinity & lim x->inifinity^+ = -infinity, then lim
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2. asked by Moly
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