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Find the 18th term of AP: …

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Find the 18th term of AP: √2,√18,√50,√98,...

Posted by Anand Raj 6 years, 9 months ago

CBSE > Class 10 > Mathematics

7 answers

Pragati Jadav 6 years, 9 months ago

Ap= √2,√18,√50, √98 it can also be writtenin the form Ap=√2,3√2,5√2,7√2...... A=√2. D=2√2. Now, a of 18= a+( n-1 )×d. √2+17×2√2. = √2+34√2. =35√2 answer.?

Ansh Kumar 6 years, 9 months ago

Ap is in form /2, 3/2, 5/2 ........ where / means root and difference d = a2-a1 =3/2-/2 = 2/2 a=/2 d=2/2 a18= a+17d = /2 + 17×2/2 = /2 + 34/2 =35/2 = /2450

Ram Kushwah 6 years, 9 months ago

The AP can be written as:

√2 ,3 √2 ,5 √2 ,7 √2 ...

a= √2 and d=2 √2

a₁₈= √2 +17*2 √2

=(1+34) √2

=35 √2 ={tex}\sqrt 2450{/tex}

Affu 😊 6 years, 9 months ago

35√2

Aditya Mandal 6 years, 9 months ago

A=root 2 D=2 root2 N=18 Therefore applying a+(n-1)d ANSWER IS= 35root2

Puja Sahoo? 6 years, 9 months ago

35 root 2.....

Rohit Sreeram 6 years, 9 months ago

sqrt 2450

ANSWER

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