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3 years ago

The slant height is 8 inches and the diameter is 8 inches, what

Mathematics

1 answer:

Lynna [10]3 years ago

4 0

Answer:

150.85inches

Step-by-step explanation:

TSA of cone= πr(r+l)

= 22/7×4(4+8)

= 150.85inches

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9514 1404 393

Answer:

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Step-by-step explanation:

About the easiest way to do this for small values of n is to compute each of the terms using the given recurrence relation.

$a_1=4\\\\a_2=-3a_1=-3(4)=-12\\\\a_3=-3a_2=-3(-12)=36\\\\a_4=-3a_3=-3(36)=-108\\\\\boxed{a_4=-108}$

_____

<em>Alternate solution</em>

You recognize that the recurrence relation describes a geometric sequence with a first term of 4 and a common ratio of -3. The n-th term of a geometric sequence is ...

$a_n=a_1\cdot r^{n-1} \qquad\text{for first term $a_1$ and common ratio $r$}$

Then the 4th term will be ...

$a_4=4\cdot(-3)^{4-1}=4\cdot(-27)=-108$

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