Question

find k if for (k)=5where f(k)_2k-1​

Answer 1

Answer:

f(5) = 2(5)-1

= 10-1

= 9

Step-by-step explanation:

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Answer 2

question :-

find k if x = 5 where f(x) = 2k-1 ?

Solution :-

put the value of x = 5 in the equation .

$\bold{\implies\: (x) \: = \: 2 \: k \: - \: 1}$

$\bold{\implies \: (5) \: = \: 2 \: k \: - \: 1}$

$\bold{\bigstar \: \: now \: remove \: the \: brackets }$

$\bold{\implies \: 5\: + \: 1 = \: 2 \: k \: }$

$\bold{\implies \: 6 = \: 2 \: k \: }$

$\bold{\implies \: \frac{6}{2} =\: k }$

$\bold{\implies \: 3 = \:k \:}$

$\bold{\bigstar \: \: \: the \: value \: of \: k \: is \: \: 3}$

Varification :-

put the values in the equation

• x = 5
• k = 3

$\bold{\implies \:\: (x) \: = \: 2 \: k \: - \: 1}$

$\bold{\implies \: (5) \: = \: 2 \: \times \: 3 \: - \: 1}$

$\bold{\bigstar \: now \: remove \: the \: brackets}$

$\bold{\implies \: 5\: = \: 2 \: \times \: 3 \: - \: 1}$

$\bold{\implies \: 5= \: 6 \: - \: 1}$

$\bold{\implies \:5\: = \: 5 \: }$

$\bold{\bigstar \: \: \: \: \:LHS \: = \: RHS\:}$

Hence Varified