Question

guys solve this sum ​

Answer 1

$\huge \bold{\underline \pink{Question \: : \: }}$

Find the 11th term of the arithmetic progression .

$\huge \bold{\underline \red{Answer \: : \: }}$

$\bold \green{ \star{ \: Solution :}}$

$\bold{let} \: \: t_{1} \: , \: t_{2} \: , \: t_{3} \: , \: t_{4} \: . \: . \: \: . \bold{be \: the} \\ \bold{arithmetic \: progression} \: .$

$\\ \bold \blue{ \star{ \: Formula :}}$

$\bold{ t_{n} = a + (n - 1)d}$

$\bold \orange{ \star{ \:Given :}}$

$\bold{ t_{1} = a = - 5}$

$\bold{d} = t_{3} - t_{2}$

$\: \: \: = 0 - ( - \frac{5}{2})$

$\: \: \: = \frac{5}{2}$

$\bold{{\implies} \orange{d = \frac{5}{2} }}$

$\bold{ t_{11}} = - 5 + (11 - 1) \times \frac{5}{2}$

$\: \: \: \: \: \: \: = - 5 + 10 \times (\frac{5}{2} )$

$\: \: \: \: \: \: \: = - 5 + (5 \times 5)$

$\: \: \: \: \: \: \: = - 5 + 25$

$\: \: \: \: \: \: \: = 20$

$\bold{{ \implies} \purple{ t_{11} = 20}}$

therefore,

option (B) 20 is the answer

Answer 2

Answer:

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