All categories

3 years ago

If the sum of a term of an ap is 2n square + 5n then find the 4th term

Mathematics

2 answers:

zlopas [31]3 years ago

7 0

Answer:

Step-by-step explanation

Let the sum of n terms of A.P. = Sn

Vesna [10]3 years ago

5 0

The fourth term is 19 !!!!!!!

You might be interested in

What are solutions to the equation below x^2 +3x-18=0

Ivenika [448]

$x^2 +3x-18=0\\ x^2-3x+6x-18=0\\ x(x-3)+6(x-3)=0\\ (x+6)(x-3)=0\\ x=-6 \vee x=3$

5 0

3 years ago

Read 2 more answers

4 1/5 divided by 2 4/5 =

Delvig [45]

The answer to 4 1/5 divided by 2 4/5 is 3/2

7 0

3 years ago

Read 2 more answers

Given that f(x)=x/2+5, a)find f(2) b)find f^-1(x) c)find f^-1(5)

Aleks04 [339]

A) 6
b) x/f
c) 5/f

Mark brainliest please

Hope this helps you

8 0

2 years ago

Find f. A) 7.4 B) 8.2 C) 10.5 D) 11.1

tatyana61 [14]

F=72

g=6

------------

$\cos { \left( F \right) } =\frac { { e }^{ 2 }+{ g }^{ 2 }-{ f }^{ 2 } }{ 2eg }$

Therefore:

$\cos { \left( 72 \right) } =\frac { { e }^{ 2 }+{ 6 }^{ 2 }-{ f }^{ 2 } }{ 2\cdot e\cdot 6 } \\ \\ \cos { \left( 72 \right) } =\frac { { e }^{ 2 }+36-{ f }^{ 2 } }{ 12e }$

$\\ \\ 12e\cdot \cos { \left( 72 \right) } ={ e }^{ 2 }+36-{ f }^{ 2 }\\ \\ \therefore \quad { f }^{ 2 }={ e }^{ 2 }-12e\cdot \cos { \left( 72 \right) } +36\\ \\ \therefore \quad f=\sqrt { { e }^{ 2 }-12e\cdot \cos { \left( 72 \right) +36 } } \\ \\ \therefore \quad f=\sqrt { e\left( e-12\cos { \left( 72 \right) } \right) +36 }$

But what is e?

E=76

G=32

g=6

And:

$\frac { e }{ \sin { \left( E \right) } } =\frac { g }{ \sin { \left( G \right) } }$

Which means that:

$\frac { e }{ \sin { \left( 76 \right) } } =\frac { 6 }{ \sin { \left( 32 \right) } } \\ \\ \therefore \quad e=\frac { 6\cdot \sin { \left( 76 \right) } }{ \sin { \left( 32 \right) } }$

If you take this value into account, you will discover that f is...

$f=\sqrt { \frac { 6\cdot \sin { \left( 76 \right) } }{ \sin { \left( 32 \right) } } \left( \frac { 6\cdot \sin { \left( 76 \right) } }{ \sin { \left( 32 \right) } } -12\cos { \left( 72 \right) } \right) +36 } \\ \\ \therefore \quad f=10.8\quad \left( 1\quad d.p \right)$

So I would have to say that the answer is approximately (c).

6 0

3 years ago

ian went away for 6 days to space camp.his parents received 12 emails from him while he was away.what is the rate of ians emails

Lena [83]

Answer:

2 mails everday

Step-by-step explanation:

5 0

2 years ago

If the sum of a term of an ap is 2n square + 5n then find the 4th term​

If the sum of a term of an ap is 2n square + 5n then find the 4th term