Question

Guys plzz help me plzz fastt​

Answer 1

Solution 1 :-

Here given ,

an = 24 -3n

n represent the no.of terms this means 1, 2 , 3, 4 , 5 ..........n

First term of an AP ,

an= 24 - 3n

a(1) = 24 - 3(1)

= 24 - 3

= 21

Second term of an AP,

an= 24 - 3n

a(2) = 24 - 3(2)

a(2) = 24 - 6

a(2) = 18

option 1 is right answer that is 18

Solution 2 :-

2x + 3y -9 =0

4x + 6y -18 = 0

Compare both equation with a1x + b1y + c1 = 0 (a1 = 2 , b1 = 3 and c1 = -9 and a2x + b2x + c2 = 0( a2 = 4 , b2 = 6 and c2 = -18 )

Therefore,

a1/a2 = 2 / 4 = 1 / 2

b1 /b2 = 3/6 = 1/2

c1 /c2 = -9/-18 = 1/2 (minus sign cancelled with minus sign)

So from above ,

a1/a2 = b1/b2 = c1/c2 it represents coincident lines

Option D is your answer mate

Solution 3 :-

A straight line which passes through two points on a circle is called secant. It joins the point of a circle

Option B is your answer mate

Solution 4:-

$distance \: formula \: \\ \sqrt{ {(x1 \: - x2 \: )}^{2} \: + \: {(y1 \: - y2)}^{2} } \\ find \: the \: distance \: between \\ \: (x \: and \: y)(0 \: and \: 0) \\ \\ put \: the \: values \: in \: the \: formula \: \\ \sqrt{ {(x \: - \: 0)}^{2} + \: {(y \: - \: 0 \: )}^{2} } \\ \sqrt{ {x \: }^{2} \: + \: { \: y \: }^{2} } \: is \: your \: \\ answer \: mate \:$

Option A is correct answer

Solution 5 :-

Given equation

x^2 -2x - 6

Here a = 1 , b = -2 , c = -6

The sum of zeroes = -b/a = -(-2)/1 = 2

The product of zeroes = c/a = -6/1 = -6

Option C (2 , -6 ) is your answer mate

Solution 6 :-

Given equation,

x^2 - x + 2

Here a = 1 , b = -1 , c = 2

By using discriminant ,

b^2 - 4ac

Put the values,

(-1)^2 -4* 1 * 2

1 -8 = -7

Here, -7 is smaller than 0

So it has no real roots

Option C is your answer mate

Solution 7 :-

Let's two triangles be ABC and PQR

ABC ~ PQR

Area of ABC /Area of PQR = (AB/PQ)^2 = (BC/QR)^2 = (AC/PR)^2

All corresponding sides are equal

Area of ABC /Area of PQR = (AB/PQ)^2

1/4 = ( AB/PQ)^2

AB/PQ = underroot 1/4

AB/PQ = 1/2

1 : 2 (option 1 )is your answer mate

Solution 8 :-

The value of sin30° = 1/2

The value of tan45° = 1

The value of 2sin30° - tan45° is

2 * 1/2 - 1

1 - 1 = 0

Option 1 is your answer mate